diff --git a/dom/public/idl/geolocation/nsIDOMGeoPositionError.idl b/dom/public/idl/geolocation/nsIDOMGeoPositionError.idl
index f2421018ec3..aa90068dd53 100644
--- a/dom/public/idl/geolocation/nsIDOMGeoPositionError.idl
+++ b/dom/public/idl/geolocation/nsIDOMGeoPositionError.idl
@@ -37,9 +37,14 @@
 
 #include "domstubs.idl"
 
-[scriptable, uuid(39928BF8-4466-4A64-BF5F-97114A5CD171)]
+[scriptable, uuid(1B493214-4E58-4A40-AA4C-1AB70C6DDBEC)]
 interface nsIDOMGeoPositionError : nsISupports
 {
+  const unsigned short UNKNOWN_ERROR = 0;
+  const unsigned short PERMISSION_DENIED  = 1;
+  const unsigned short POSITION_UNAVAILABLE = 2;
+  const unsigned short TIMEOUT = 3;
+
   readonly attribute short code;
   readonly attribute DOMString message;
 };
diff --git a/dom/src/geolocation/nsGeolocation.cpp b/dom/src/geolocation/nsGeolocation.cpp
index 454211e012a..fd353c34b90 100644
--- a/dom/src/geolocation/nsGeolocation.cpp
+++ b/dom/src/geolocation/nsGeolocation.cpp
@@ -159,7 +159,7 @@ nsGeolocationRequest::Init()
   // check to see if we have a geolocation provider, if not, notify an error and bail.
   nsRefPtr<nsGeolocationService> geoService = nsGeolocationService::GetInstance();
   if (!geoService->HasGeolocationProvider()) {
-    NotifyError(NS_GEO_ERROR_CODE_LOCATION_PROVIDER_ERROR);
+    NotifyError(nsIDOMGeoPositionError::POSITION_UNAVAILABLE);
     return NS_ERROR_FAILURE;;
   }
 
@@ -196,7 +196,7 @@ nsGeolocationRequest::Notify(nsITimer* aTimer)
   // ::Cancel, just a different error
   
   if (!mHasSentData) {
-    NotifyError(NS_GEO_ERROR_CODE_TIMEOUT);
+    NotifyError(nsIDOMGeoPositionError::TIMEOUT);
     // remove ourselves from the locator's callback lists.
     mLocator->RemoveRequest(this);
   }
@@ -226,7 +226,7 @@ nsGeolocationRequest::GetRequestingWindow(nsIDOMWindow * *aRequestingWindow)
 NS_IMETHODIMP
 nsGeolocationRequest::Cancel()
 {
-  NotifyError(NS_GEO_ERROR_CODE_PERMISSION_ERROR);
+  NotifyError(nsIDOMGeoPositionError::PERMISSION_DENIED);
 
   // remove ourselves from the locators callback lists.
   mLocator->RemoveRequest(this);
@@ -242,7 +242,7 @@ nsGeolocationRequest::Allow()
   
   if (NS_FAILED(rv)) {
     // Location provider error
-    NotifyError(NS_GEO_ERROR_CODE_LOCATION_PROVIDER_ERROR);
+    NotifyError(nsIDOMGeoPositionError::POSITION_UNAVAILABLE);
     return NS_OK;
   }
 
diff --git a/dom/src/geolocation/nsGeolocation.h b/dom/src/geolocation/nsGeolocation.h
index 5859d879963..1e3628ff61b 100644
--- a/dom/src/geolocation/nsGeolocation.h
+++ b/dom/src/geolocation/nsGeolocation.h
@@ -55,11 +55,6 @@
 
 #include "nsIGeolocationProvider.h"
 
-#define NS_GEO_ERROR_CODE_PERMISSION_ERROR        1
-#define NS_GEO_ERROR_CODE_LOCATION_PROVIDER_ERROR 2
-#define NS_GEO_ERROR_CODE_POSITION_NOT_FOUND      3
-#define NS_GEO_ERROR_CODE_TIMEOUT                 4
-
 class nsGeolocationService;
 class nsGeolocation;