diff --git a/test/security_manager/Makefile b/test/security_manager/Makefile
index 8a79ca4a1..f2cd6c663 100644
--- a/test/security_manager/Makefile
+++ b/test/security_manager/Makefile
@@ -4,7 +4,8 @@ CC = g++
 
 BTSTACK_ROOT =  ../..
 
-CFLAGS  = -DUNIT_TEST -x c++ -g -Wall -Wno-unused -I. -I.. -I${BTSTACK_ROOT}/src -I${BTSTACK_ROOT}/ble -I${BTSTACK_ROOT}/include
+CFLAGS  = -DUNIT_TEST -x c++ -g -Wall -Wno-unused
+CFLAGS += -I. -I.. -I${BTSTACK_ROOT}/src -I${BTSTACK_ROOT}/ble -I${BTSTACK_ROOT}/platform/posix/src
 LDFLAGS +=  -lCppUTest -lCppUTestExt
 
 VPATH += ${BTSTACK_ROOT}/src