diff --git a/xpcom/base/nsUUIDGenerator.cpp b/xpcom/base/nsUUIDGenerator.cpp
index c3ad1765a9..6ad03dd8e7 100644
--- a/xpcom/base/nsUUIDGenerator.cpp
+++ b/xpcom/base/nsUUIDGenerator.cpp
@@ -96,7 +96,6 @@ nsUUIDGenerator::GenerateUUID(nsID** aRet)
 }
 
 NS_IMETHODIMP
-nsresult
 nsUUIDGenerator::GenerateUUIDInPlace(nsID* aId)
 {
   MutexAutoLock lock(mLock);