diff --git a/lib/roken/mkdir.c b/lib/roken/mkdir.c
index 55cd8f1cf..918ff65c6 100644
--- a/lib/roken/mkdir.c
+++ b/lib/roken/mkdir.c
@@ -38,7 +38,11 @@
 #endif
 
 #include "roken.h"
-#undef mkdir
+#ifdef MKDIR_DOES_NOT_HAVE_MODE
+ #undef mkdir
+#else
+ #undef rk_mkdir
+#endif
 
 int ROKEN_LIB_FUNCTION
 rk_mkdir(const char *pathname, mode_t mode)