diff --git a/upptst/AlphaBlendDeviceCaps/main.cpp b/upptst/AlphaBlendDeviceCaps/main.cpp
index fb3ae4dd5..0d972f7ac 100644
--- a/upptst/AlphaBlendDeviceCaps/main.cpp
+++ b/upptst/AlphaBlendDeviceCaps/main.cpp
@@ -4,5 +4,7 @@ using namespace Upp;
 
 GUI_APP_MAIN
 {
+#ifdef PLATFORM_WIN32
 	DDUMP(GetDeviceCaps(GetDC(NULL), SHADEBLENDCAPS) & SB_PIXEL_ALPHA);
+#endif
 }