diff --git a/src/msw/gaugemsw.cpp b/src/msw/gaugemsw.cpp
index 4a82b4f896..97fc9b7cfb 100644
--- a/src/msw/gaugemsw.cpp
+++ b/src/msw/gaugemsw.cpp
@@ -228,7 +228,7 @@ bool wxGaugeMSW::SetForegroundColour(const wxColour& col)
     return TRUE;
 }
 
-void wxGaugeMSW::SetBackgroundColour(const wxColour& col)
+bool wxGaugeMSW::SetBackgroundColour(const wxColour& col)
 {
     if ( !wxControl::SetBackgroundColour(col) )
         return FALSE;