diff --git a/src/mgl/app.cpp b/src/mgl/app.cpp
index bcb909fcc8..9112462198 100644
--- a/src/mgl/app.cpp
+++ b/src/mgl/app.cpp
@@ -35,6 +35,7 @@
 #include "wx/univ/theme.h"
 #include "wx/univ/renderer.h"
 #include "wx/univ/colschem.h"
+#include "wx/sysopt.h"
 #include "wx/mgl/private.h"
 
 //-----------------------------------------------------------------------------
@@ -156,7 +157,7 @@ static bool wxCreateMGL_WM(const wxDisplayModeInfo& displayMode)
     int refresh = MGL_DEFAULT_REFRESH;
     
 #if wxUSE_SYSTEM_OPTIONS
-    if ( wxSystemOptions::HasOption(wxT("mgl.screen-refresh") )
+    if ( wxSystemOptions::HasOption(wxT("mgl.screen-refresh")) )
         refresh = wxSystemOptions::GetOptionInt(wxT("mgl.screen-refresh"));
 #endif
         
diff --git a/src/mgl/fontutil.cpp b/src/mgl/fontutil.cpp
index 3fcbc396d8..ff86adca53 100644
--- a/src/mgl/fontutil.cpp
+++ b/src/mgl/fontutil.cpp
@@ -245,7 +245,7 @@ wxMGLFontInstance *wxMGLFontLibrary::GetFontInstance(wxFont *font,
     {
         gs_antialiasingThreshold = 10;
 #if wxUSE_SYSTEM_OPTIONS
-        if ( wxSystemOptions::HasOption(wxT("mgl.aa-threshold") )
+        if ( wxSystemOptions::HasOption(wxT("mgl.aa-threshold")) )
             gs_antialiasingThreshold = 
                 wxSystemOptions::GetOptionInt(wxT("mgl.aa-threshold"));
         wxLogTrace("mgl_font", "AA threshold set to %i", gs_antialiasingThreshold);