diff --git a/src/engine/graphic/GRInstrument.cpp b/src/engine/graphic/GRInstrument.cpp
index f873fc98..e72e6394 100644
--- a/src/engine/graphic/GRInstrument.cpp
+++ b/src/engine/graphic/GRInstrument.cpp
@@ -12,7 +12,7 @@
 
 */
 
-#include <string>
+#include <string.h>
 
 #include "GRInstrument.h"
 #include "GRDefine.h"