diff --git a/tests/wolfssl-interoperability/Makefile b/tests/wolfssl-interoperability/Makefile
index 0abf3081..06bc49fb 100644
--- a/tests/wolfssl-interoperability/Makefile
+++ b/tests/wolfssl-interoperability/Makefile
@@ -10,7 +10,7 @@ WOLFPKCS11_DIR ?= ../..
 
 BUILD_DIR := build
 
-COMMON_CPPFLAGS := -DWOLFSSL_USER_SETTINGS -I. -I.. \
+COMMON_CPPFLAGS := -DWOLFSSL_USER_SETTINGS -DWOLFPKCS11_USER_SETTINGS -I. -I.. \
     -I$(WOLFSSL_DIR) -I$(WOLFSSL_DIR)/wolfssl -I$(WOLFSSL_DIR)/wolfssl/wolfcrypt \
     -I$(WOLFPKCS11_DIR) -I$(WOLFPKCS11_DIR)/wolfpkcs11 -I$(WOLFPKCS11_DIR)/src
 WOLFCRYPT_CPPFLAGS := $(COMMON_CPPFLAGS) -DWOLFSSL_LIB