diff --git a/libs/libks/src/simclist.c b/libs/libks/src/simclist.c
index 4726c78648..78dda9af14 100755
--- a/libs/libks/src/simclist.c
+++ b/libs/libks/src/simclist.c
@@ -45,8 +45,10 @@
 
 /* disable asserts */
 #ifndef SIMCLIST_DEBUG
+#ifndef NDEBUG
 #define NDEBUG
 #endif
+#endif
 
 #include <assert.h>