diff --git a/include/wx/propgrid/propgridpagestate.h b/include/wx/propgrid/propgridpagestate.h
index 6ffafbd5c1..717982bf1c 100644
--- a/include/wx/propgrid/propgridpagestate.h
+++ b/include/wx/propgrid/propgridpagestate.h
@@ -758,7 +758,7 @@ protected:
     /** Indicates total virtual height of visible properties. */
     unsigned int                m_virtualHeight;
 
-#ifdef WXWIN_COMPATIBILITY_3_0
+#if WXWIN_COMPATIBILITY_3_0
     /** 1 if m_lastCaption is also the bottommost caption. */
     unsigned char               m_lastCaptionBottomnest;