diff --git a/src/osx/utils_osx.cpp b/src/osx/utils_osx.cpp
index b51184f701..47e07ba683 100644
--- a/src/osx/utils_osx.cpp
+++ b/src/osx/utils_osx.cpp
@@ -150,11 +150,23 @@ bool wxDoLaunchDefaultBrowser(const wxLaunchBrowserParams& params)
 
 void wxDisplaySizeMM(int *width, int *height)
 {
+#if wxOSX_USE_IPHONE
+    wxDisplaySize(width, height);
+    // on mac 72 is fixed (at least now;-)
+    double cvPt2Mm = 25.4 / 72;
+    
+    if (width != NULL)
+        *width = int( *width * cvPt2Mm );
+    
+    if (height != NULL)
+        *height = int( *height * cvPt2Mm );
+#else
     CGSize size = CGDisplayScreenSize(CGMainDisplayID());
     if ( width )
         *width = (int)size.width ;
     if ( height )
         *height = (int)size.height;
+#endif
 }