diff --git a/Common/OS.cpp b/Common/OS.cpp
index f82efdea9a10878a1f9a911e5d5dd5f42edfe9c4..61c0be363050aaa4b78f5f84aba8c140491ed736 100644
--- a/Common/OS.cpp
+++ b/Common/OS.cpp
@@ -14,7 +14,6 @@
 #include <signal.h>
 #include <time.h>
 #include <math.h>
-#include "FlGui.h"
 #include "GmshConfig.h"
 #include "StringUtils.h"
 #include "Context.h"