diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
index 800940b..b98e6de 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
@@ -22,6 +22,7 @@
 
 using namespace clang;
 using namespace CodeGen;
+using namespace llvm::omp;
 
 namespace {
 enum OpenMPRTLFunctionNVPTX {