diff --git a/llvm/lib/ProfileData/SampleProf.cpp b/llvm/lib/ProfileData/SampleProf.cpp
index 30438ba..b0818d1 100644
--- a/llvm/lib/ProfileData/SampleProf.cpp
+++ b/llvm/lib/ProfileData/SampleProf.cpp
@@ -26,6 +26,14 @@
 using namespace llvm;
 using namespace sampleprof;
 
+namespace llvm {
+namespace sampleprof {
+SampleProfileFormat FunctionSamples::Format;
+DenseMap<uint64_t, StringRef> FunctionSamples::GUIDToFuncNameMap;
+Module *FunctionSamples::CurrentModule;
+} // namespace sampleprof
+} // namespace llvm
+
 namespace {
 
 // FIXME: This class is only here to support the transition to llvm::Error. It