diff --git a/source/blender/imbuf/intern/divers.c b/source/blender/imbuf/intern/divers.c
index e84a9302bbf..35be1f716e6 100644
--- a/source/blender/imbuf/intern/divers.c
+++ b/source/blender/imbuf/intern/divers.c
@@ -31,6 +31,7 @@
 
 #include "BLI_blenlib.h"
 #include "BLI_rand.h"
+#include "BLI_math.h"
 
 #include "imbuf.h"
 #include "imbuf_patch.h"