diff --git a/lib/checkclass.cpp b/lib/checkclass.cpp
index 8a12a3e2f66..e4989ba4376 100644
--- a/lib/checkclass.cpp
+++ b/lib/checkclass.cpp
@@ -244,11 +244,19 @@ void CheckClass::constructors()
                 if (!var.isPointer() && !var.isPointerArray() && var.isClass() && func.type == FunctionType::eConstructor) {
                     // Unknown type so assume it is initialized
                     if (!var.type()) {
-                        if (var.isStlType() && var.valueType() && var.valueType()->containerTypeToken && var.getTypeName() == "std::array") {
-                            const Token* ctt = var.valueType()->containerTypeToken;
-                            if (!ctt->isStandardType() &&
-                                (!ctt->type() || ctt->type()->needInitialization != Type::NeedInitialization::True) &&
-                                !mSettings->library.podtype(ctt->str())) // TODO: handle complex type expression
+                        if (var.isStlType() && var.valueType() && var.valueType()->containerTypeToken) {
+                            if (var.valueType()->type == ValueType::Type::ITERATOR)
+                            {
+                                // needs initialization
+                            }
+                            else if (var.getTypeName() == "std::array") {
+                                const Token* ctt = var.valueType()->containerTypeToken;
+                                if (!ctt->isStandardType() &&
+                                    (!ctt->type() || ctt->type()->needInitialization != Type::NeedInitialization::True) &&
+                                    !mSettings->library.podtype(ctt->str())) // TODO: handle complex type expression
+                                    continue;
+                            }
+                            else
                                 continue;
                         }
                         else
diff --git a/test/testconstructors.cpp b/test/testconstructors.cpp
index 39de3b1cf1d..8023990f629 100644
--- a/test/testconstructors.cpp
+++ b/test/testconstructors.cpp
@@ -173,6 +173,7 @@ class TestConstructors : public TestFixture {
         TEST_CASE(uninitVar34); // ticket #10841
         TEST_CASE(uninitVar35);
         TEST_CASE(uninitVar36);
+        TEST_CASE(uninitVar37);
         TEST_CASE(uninitVarEnum1);
         TEST_CASE(uninitVarEnum2); // ticket #8146
         TEST_CASE(uninitVarStream);
@@ -3031,6 +3032,15 @@ class TestConstructors : public TestFixture {
         ASSERT_EQUALS("[test.cpp:5:5]: (warning) Member variable 'S::b' is not initialized in the constructor. [uninitMemberVar]\n", errout_str());
     }
 
+    void uninitVar37() {
+        const Settings s = settingsBuilder(settings).library("std.cfg").build();
+        check("struct C {\n" // #13989
+              "    C() = default;\n"
+              "    std::list<int>::const_iterator it;\n"
+              "};\n", dinit(CheckOptions, $.s = &s));
+        ASSERT_EQUALS("[test.cpp:2:5]: (warning) Member variable 'C::it' is not initialized in the constructor. [uninitMemberVar]\n", errout_str());
+    }
+
     void uninitVarArray1() {
         check("class John\n"
               "{\n"