diff --git a/cef3/libcef/browser/browser_context.cc b/cef3/libcef/browser/browser_context.cc
index b914c04b1..3dbc0e7a3 100644
--- a/cef3/libcef/browser/browser_context.cc
+++ b/cef3/libcef/browser/browser_context.cc
@@ -109,7 +109,7 @@ class CefGeolocationPermissionContext
     }
 
     // Disallow geolocation access by default.
-    callback.Run(false);
+    CEF_POST_TASK(CEF_UIT, base::Bind(callback, false));
   }
 
   virtual void CancelGeolocationPermissionRequest(