diff --git a/core/src/mirror.h b/core/src/mirror.h
index ca703e5..0ec937c 100644
--- a/core/src/mirror.h
+++ b/core/src/mirror.h
@@ -82,7 +82,7 @@ List* T##_get_typeclasses(T* self) {\
     static char init_flag = 0;\
     static List typeclasses;\
     if(!init_flag) {\
-        init_flag = 1,\
+        init_flag = 1;\
         typeclasses = list_init(sizeof(MirroredTypeclass));\
         MirroredTypeclass tc;