diff --git a/lib/share.c b/lib/share.c
index df4d5ec14cde67d5b41b001cce66ac0f3a125663..798a0a49787b38885bab52c0b6208e6c039f84a2 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