diff --git a/src/generic/clrpickerg.cpp b/src/generic/clrpickerg.cpp
index 6eff895c8d..6cd4055e16 100644
--- a/src/generic/clrpickerg.cpp
+++ b/src/generic/clrpickerg.cpp
@@ -64,7 +64,7 @@ bool wxGenericColourButton::Create( wxWindow *parent, wxWindowID id,
     m_colour = col;
     UpdateColour();
     InitColourData();
-    ms_data.SetChooseAlpha(style & wxCLRP_SHOW_ALPHA);
+    ms_data.SetChooseAlpha((style & wxCLRP_SHOW_ALPHA) != 0);
 
     return true;
 }