1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Analysis/IntervalPartition.cpp b/lib/Analysis/IntervalPartition.cpp
index 97e8b71572..30bf02e9ee 100644
--- a/lib/Analysis/IntervalPartition.cpp
+++ b/lib/Analysis/IntervalPartition.cpp
@@ -26,7 +26,7 @@ void IntervalPartition::destroy() {
   RootInterval = 0;
 }
 
-void IntervalPartition::print(ostream &O) const {
+void IntervalPartition::print(std::ostream &O) const {
   std::copy(begin(), end(),
             std::ostream_iterator<const Interval *>(O, "\n"));
 }