diff --git a/windows/sound.h b/windows/sound.h
index b35a4712..28c1863f 100755
--- a/windows/sound.h
+++ b/windows/sound.h
@@ -27,7 +27,7 @@
 
 #include <windows.h>
 #include <QMutex>
-#include <QMessagebox>
+#include <QMessageBox>
 #include "../src/util.h"
 #include "../src/global.h"
 #include "../src/soundbase.h"