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-rw-r--r--src/plugins/platforms/windows/qtwindows_additional.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qtwindows_additional.h b/src/plugins/platforms/windows/qtwindows_additional.h
index 49ddf3106b..4c08a664d8 100644
--- a/src/plugins/platforms/windows/qtwindows_additional.h
+++ b/src/plugins/platforms/windows/qtwindows_additional.h
@@ -49,6 +49,10 @@
# define WM_THEMECHANGED 0x031A
#endif
+#ifndef WM_DWMCOMPOSITIONCHANGED
+# define WM_DWMCOMPOSITIONCHANGED 0x31E
+#endif
+
#ifndef GWL_HWNDPARENT
# define GWL_HWNDPARENT (-8)
#endif