diff --git a/lib/share.c b/lib/share.c
index df4d5ec14..798a0a497 100644
--- a/lib/share.c
+++ b/lib/share.c
@@ -30,7 +30,7 @@
 #include "share.h"
 
 /* The last #include file should be: */
-#ifdef MALLOCDEBUG
+#ifdef CURLDEBUG
 #include "memdebug.h"
 #endif