diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index feb9d75932e..44d81883359 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1915,7 +1915,7 @@ unsigned SelectionDAGLowering::Clusterify(CaseVector& Cases,
                          SI.getSuccessorValue(i),
                          SMBB));
   }
-  sort(Cases.begin(), Cases.end(), CaseCmp());
+  std::sort(Cases.begin(), Cases.end(), CaseCmp());
 
   // Merge case into clusters
   if (Cases.size()>=2)
diff --git a/lib/Transforms/Utils/LowerSwitch.cpp b/lib/Transforms/Utils/LowerSwitch.cpp
index faa4e551604..3c08edf0c6a 100644
--- a/lib/Transforms/Utils/LowerSwitch.cpp
+++ b/lib/Transforms/Utils/LowerSwitch.cpp
@@ -244,7 +244,7 @@ unsigned LowerSwitch::Clusterify(CaseVector& Cases, SwitchInst *SI) {
     Cases.push_back(CaseRange(SI->getSuccessorValue(i),
                               SI->getSuccessorValue(i),
                               SI->getSuccessor(i)));
-  sort(Cases.begin(), Cases.end(), CaseCmp());
+  std::sort(Cases.begin(), Cases.end(), CaseCmp());
 
   // Merge case into clusters
   if (Cases.size()>=2)