diff --git a/src/mac/carbon/dirdlg.cpp b/src/mac/carbon/dirdlg.cpp
index 49ae77655e..df4aeff10d 100644
--- a/src/mac/carbon/dirdlg.cpp
+++ b/src/mac/carbon/dirdlg.cpp
@@ -77,7 +77,7 @@ wxDirDialog::wxDirDialog(wxWindow *parent,
 
 int wxDirDialog::ShowModal()
 {
-    NavDialogRef dialog;
+    NavDialogRef dialog = NULL;
     NavDialogCreationOptions options;
     NavReplyRecord reply ;
     bool disposeReply = false ;
@@ -134,6 +134,9 @@ int wxDirDialog::ShowModal()
     // apparently cancelling shouldn't change m_path
     if ( err != noErr && err != userCanceledErr )
         m_path = wxEmptyString ;
+    	
+	if ( dialog )
+    	::NavDialogDispose(dialog);
 
     return (err == noErr) ? wxID_OK : wxID_CANCEL ;
 }
diff --git a/src/mac/carbon/filedlg.cpp b/src/mac/carbon/filedlg.cpp
index 482891f49a..bee5c465a1 100644
--- a/src/mac/carbon/filedlg.cpp
+++ b/src/mac/carbon/filedlg.cpp
@@ -380,7 +380,10 @@ int wxFileDialog::ShowModal()
         ::DisposeNavObjectFilterUPP(navFilterUPP);
 
     if (err != noErr)
+    {
+        ::NavDialogDispose(dialog);
         return wxID_CANCEL;
+    }
 
     NavReplyRecord navReply;
     err = ::NavDialogGetReply(dialog, &navReply);
@@ -411,6 +414,7 @@ int wxFileDialog::ShowModal()
             if (!thePath)
             {
                 ::NavDisposeReply(&navReply);
+                ::NavDialogDispose(dialog);
                 return wxID_CANCEL;
             }
 
@@ -427,6 +431,7 @@ int wxFileDialog::ShowModal()
     }
 
     ::NavDisposeReply(&navReply);
+    ::NavDialogDispose(dialog);
 
     return (err == noErr) ? wxID_OK : wxID_CANCEL;
 }