diff --git a/src/gl/system/gl_swframebuffer.h b/src/gl/system/gl_swframebuffer.h
index c37cf6bf0..0f9c0a0ef 100644
--- a/src/gl/system/gl_swframebuffer.h
+++ b/src/gl/system/gl_swframebuffer.h
@@ -454,7 +454,9 @@ private:
 	int TrueHeight;
 	int PixelDoubling;
 	float Gamma;
+#ifdef _WIN32
 	bool UpdatePending;
+#endif // _WIN32
 	bool NeedPalUpdate;
 	bool NeedGammaUpdate;
 	LTRBRect BlendingRect;