diff --git a/src/univ/theme.cpp b/src/univ/theme.cpp
index 026dc29899..f9e384c683 100644
--- a/src/univ/theme.cpp
+++ b/src/univ/theme.cpp
@@ -101,6 +101,8 @@ wxThemeInfo::wxThemeInfo(Constructor c,
             nameDefTheme = _T("win32");
         #elif defined(__WXGTK__)
             nameDefTheme = _T("gtk");
+        #elif defined(__WXMGL__)
+            nameDefTheme = _T("win32");
         #endif
     }