diff --git a/src/gtk/toplevel.cpp b/src/gtk/toplevel.cpp
index 29eed82776..eff0e4f34e 100644
--- a/src/gtk/toplevel.cpp
+++ b/src/gtk/toplevel.cpp
@@ -626,7 +626,7 @@ bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long style )
 
     m_fsIsShowing = show;
 
-#ifdef __WXGTK20__
+#if GTK_CHECK_VERSION(2,2,0)
 
     if (show)
         gtk_window_fullscreen( GTK_WINDOW( m_widget ) );
diff --git a/src/gtk1/toplevel.cpp b/src/gtk1/toplevel.cpp
index 29eed82776..eff0e4f34e 100644
--- a/src/gtk1/toplevel.cpp
+++ b/src/gtk1/toplevel.cpp
@@ -626,7 +626,7 @@ bool wxTopLevelWindowGTK::ShowFullScreen(bool show, long style )
 
     m_fsIsShowing = show;
 
-#ifdef __WXGTK20__
+#if GTK_CHECK_VERSION(2,2,0)
 
     if (show)
         gtk_window_fullscreen( GTK_WINDOW( m_widget ) );