diff --git a/intern/guardedalloc/intern/mallocn.c b/intern/guardedalloc/intern/mallocn.c
index 0c512f4ee0e..cae0436b48b 100644
--- a/intern/guardedalloc/intern/mallocn.c
+++ b/intern/guardedalloc/intern/mallocn.c
@@ -50,11 +50,11 @@
 
 #include "MEM_guardedalloc.h"
 
-#include "atomic_ops.h"
-
 /* should always be defined except for experimental cases */
 #ifdef WITH_GUARDEDALLOC
 
+#include "atomic_ops.h"
+
 /* Blame Microsoft for LLP64 and no inttypes.h, quick workaround needed: */
 #if defined(WIN64)
 #  define SIZET_FORMAT "%I64u"