diff --git a/crates/bindings-typescript/case-conversion-test-client/src/module_bindings/index.ts b/crates/bindings-typescript/case-conversion-test-client/src/module_bindings/index.ts
index 8fbf73d58d4..82ddf0cb52f 100644
--- a/crates/bindings-typescript/case-conversion-test-client/src/module_bindings/index.ts
+++ b/crates/bindings-typescript/case-conversion-test-client/src/module_bindings/index.ts
@@ -229,10 +229,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/crates/bindings-typescript/test-app/src/module_bindings/index.ts b/crates/bindings-typescript/test-app/src/module_bindings/index.ts
index 5a5cc759b17..cf33870746c 100644
--- a/crates/bindings-typescript/test-app/src/module_bindings/index.ts
+++ b/crates/bindings-typescript/test-app/src/module_bindings/index.ts
@@ -249,10 +249,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/crates/bindings-typescript/test-react-router-app/src/module_bindings/index.ts b/crates/bindings-typescript/test-react-router-app/src/module_bindings/index.ts
index 5a7a64d1e2b..dae611869c6 100644
--- a/crates/bindings-typescript/test-react-router-app/src/module_bindings/index.ts
+++ b/crates/bindings-typescript/test-react-router-app/src/module_bindings/index.ts
@@ -227,10 +227,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/crates/bindings-typescript/test-solid-router/src/module_bindings/index.ts b/crates/bindings-typescript/test-solid-router/src/module_bindings/index.ts
index 5a7a64d1e2b..dae611869c6 100644
--- a/crates/bindings-typescript/test-solid-router/src/module_bindings/index.ts
+++ b/crates/bindings-typescript/test-solid-router/src/module_bindings/index.ts
@@ -227,10 +227,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/crates/codegen/src/typescript.rs b/crates/codegen/src/typescript.rs
index 2706949d05b..226ecb0fcc8 100644
--- a/crates/codegen/src/typescript.rs
+++ b/crates/codegen/src/typescript.rs
@@ -759,6 +759,16 @@ impl Lang for TypeScript {
         );
 
         writeln!(out);
+        if has_table_accessor_aliases {
+            // Narrow `db` by merging an interface into the class rather than with a
+            // `declare` field, which Babel (React Native, Expo) rejects by default.
+            writeln!(out, "export interface DbConnection {{");
+            out.indent(1);
+            writeln!(out, "db: DbView;");
+            out.dedent(1);
+            writeln!(out, "}}");
+            writeln!(out);
+        }
         writeln!(out, "/** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */");
         writeln!(
             out,
@@ -766,9 +776,6 @@ impl Lang for TypeScript {
         );
         out.indent(1);
         if has_table_accessor_aliases {
-            writeln!(out, "declare db: DbView;");
-
-            writeln!(out);
             writeln!(
                 out,
                 "constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {{"
diff --git a/crates/codegen/tests/snapshots/codegen__codegen_typescript.snap b/crates/codegen/tests/snapshots/codegen__codegen_typescript.snap
index 80b88f79b73..e32448cbd40 100644
--- a/crates/codegen/tests/snapshots/codegen__codegen_typescript.snap
+++ b/crates/codegen/tests/snapshots/codegen__codegen_typescript.snap
@@ -409,10 +409,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<typeof REMOTE
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/demo/Blackholio/client-ts/src/module_bindings/index.ts b/demo/Blackholio/client-ts/src/module_bindings/index.ts
index 81afe450da0..0e7f3e8df74 100644
--- a/demo/Blackholio/client-ts/src/module_bindings/index.ts
+++ b/demo/Blackholio/client-ts/src/module_bindings/index.ts
@@ -219,10 +219,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<typeof REMOTE
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/templates/hangman-react-ts/src/module_bindings/index.ts b/templates/hangman-react-ts/src/module_bindings/index.ts
index 6852d40b6fe..625f44b14a7 100644
--- a/templates/hangman-react-ts/src/module_bindings/index.ts
+++ b/templates/hangman-react-ts/src/module_bindings/index.ts
@@ -259,10 +259,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;
diff --git a/templates/money-exchange-react-ts/src/module_bindings/index.ts b/templates/money-exchange-react-ts/src/module_bindings/index.ts
index c4bf96e2c56..ee0cd17aa2f 100644
--- a/templates/money-exchange-react-ts/src/module_bindings/index.ts
+++ b/templates/money-exchange-react-ts/src/module_bindings/index.ts
@@ -229,10 +229,12 @@ export class SubscriptionBuilder extends __SubscriptionBuilderImpl<
 /** Builder class to configure a new database connection to the remote SpacetimeDB instance. */
 export class DbConnectionBuilder extends __DbConnectionBuilder<DbConnection> {}
 
+export interface DbConnection {
+  db: DbView;
+}
+
 /** The typed database connection to manage connections to the remote SpacetimeDB instance. This class has type information specific to the generated module. */
 export class DbConnection extends __DbConnectionImpl<typeof REMOTE_MODULE> {
-  declare db: DbView;
-
   constructor(config: __DbConnectionConfig<typeof REMOTE_MODULE>) {
     super(config);
     this.db = __withTableAccessorAliases(this.db) as DbView;