diff --git a/samples/dialogs/dialogs.h b/samples/dialogs/dialogs.h
index 16b915ac85..2073b2dcc8 100644
--- a/samples/dialogs/dialogs.h
+++ b/samples/dialogs/dialogs.h
@@ -15,7 +15,7 @@
 #define USE_COLOURDLG_GENERIC                                                     \
     (                                                                             \
         wxUSE_COLOURDLG &&                                                        \
-        ( defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXGTK20__) ) &&   \
+        ( defined(__WXMSW__) || defined(__WXMAC__) ) &&   \
         !defined(__WXUNIVERSAL__)                                                 \
     )
 
@@ -23,7 +23,7 @@
 #define USE_FONTDLG_GENERIC                                                       \
     (                                                                             \
         wxUSE_FONTDLG &&                                                          \
-        ( defined(__WXMSW__) || defined(__WXGTK__) || defined(__WXPM__) ) &&      \
+        ( defined(__WXMSW__) || defined(__WXPM__) ) &&      \
         !defined(__WXUNIVERSAL__)                                                 \
     )