diff --git a/src/stable.h b/src/stable.h
index bcc23a610..09cd50c93 100644
--- a/src/stable.h
+++ b/src/stable.h
@@ -38,6 +38,9 @@ were in use. */
 
 #if defined __cplusplus
 /* Add C++ includes here */
+#ifdef Q_CC_MSVC
+#define _USE_MATH_DEFINES
+#endif
 #include <QtCore>
 #include <QApplication>
 #include <QtGlobal>