diff --git a/mozilla/xpcom/base/nsCOMPtr.cpp b/mozilla/xpcom/base/nsCOMPtr.cpp
index 9db358629de..35e7bdd0249 100644
--- a/mozilla/xpcom/base/nsCOMPtr.cpp
+++ b/mozilla/xpcom/base/nsCOMPtr.cpp
@@ -50,5 +50,5 @@ nsCOMPtr_base::begin_assignment()
     if ( mRawPtr )
       NSCAP_RELEASE(mRawPtr);
     mRawPtr = 0;
-    return NSCAP_REINTERPRET_CAST(void**, mRawPtr);
+    return NSCAP_REINTERPRET_CAST(void**, &mRawPtr);
   }
diff --git a/mozilla/xpcom/glue/nsCOMPtr.cpp b/mozilla/xpcom/glue/nsCOMPtr.cpp
index 9db358629de..35e7bdd0249 100644
--- a/mozilla/xpcom/glue/nsCOMPtr.cpp
+++ b/mozilla/xpcom/glue/nsCOMPtr.cpp
@@ -50,5 +50,5 @@ nsCOMPtr_base::begin_assignment()
     if ( mRawPtr )
       NSCAP_RELEASE(mRawPtr);
     mRawPtr = 0;
-    return NSCAP_REINTERPRET_CAST(void**, mRawPtr);
+    return NSCAP_REINTERPRET_CAST(void**, &mRawPtr);
   }
diff --git a/mozilla/xpcom/src/nsCOMPtr.cpp b/mozilla/xpcom/src/nsCOMPtr.cpp
index 9db358629de..35e7bdd0249 100644
--- a/mozilla/xpcom/src/nsCOMPtr.cpp
+++ b/mozilla/xpcom/src/nsCOMPtr.cpp
@@ -50,5 +50,5 @@ nsCOMPtr_base::begin_assignment()
     if ( mRawPtr )
       NSCAP_RELEASE(mRawPtr);
     mRawPtr = 0;
-    return NSCAP_REINTERPRET_CAST(void**, mRawPtr);
+    return NSCAP_REINTERPRET_CAST(void**, &mRawPtr);
   }