diff --git a/intern/smoke/intern/WAVELET_NOISE.h b/intern/smoke/intern/WAVELET_NOISE.h
index fce901b68aa..1b2fbfab58c 100644
--- a/intern/smoke/intern/WAVELET_NOISE.h
+++ b/intern/smoke/intern/WAVELET_NOISE.h
@@ -45,6 +45,8 @@
 
 #include <MERSENNETWISTER.h>
 
+#include <string.h>
+
 #ifdef WIN32
 #include <float.h>
 #define isnan _isnan