diff --git a/include/llvm/Support/GCOV.h b/include/llvm/Support/GCOV.h
index 19e1ce89cbd..45d5fa04257 100644
--- a/include/llvm/Support/GCOV.h
+++ b/include/llvm/Support/GCOV.h
@@ -27,13 +27,15 @@ class GCOVBlock;
 class GCOVLines;
 class FileInfo;
 
-enum GCOVFormat {
-  InvalidGCOV,
-  GCNO_402,
-  GCNO_404,
-  GCDA_402,
-  GCDA_404
-};
+namespace GCOV {
+  enum GCOVFormat {
+    InvalidGCOV,
+    GCNO_402,
+    GCNO_404,
+    GCDA_402,
+    GCDA_404
+  };
+} // end GCOV namespace
 
 /// GCOVBuffer - A wrapper around MemoryBuffer to provide GCOV specific
 /// read operations.
@@ -42,20 +44,20 @@ public:
   GCOVBuffer(MemoryBuffer *B) : Buffer(B), Cursor(0) {}
   
   /// readGCOVFormat - Read GCOV signature at the beginning of buffer.
-  enum GCOVFormat readGCOVFormat() {
+  GCOV::GCOVFormat readGCOVFormat() {
     StringRef Magic = Buffer->getBuffer().slice(0, 12);
     Cursor = 12;
     if (Magic == "oncg*404MVLL")
-      return GCNO_404;
+      return GCOV::GCNO_404;
     else if (Magic == "oncg*204MVLL")
-      return GCNO_402;
+      return GCOV::GCNO_402;
     else if (Magic == "adcg*404MVLL")
-      return GCDA_404;
+      return GCOV::GCDA_404;
     else if (Magic == "adcg*204MVLL")
-      return GCDA_402;
+      return GCOV::GCDA_402;
     
     Cursor = 0;
-    return InvalidGCOV;
+    return GCOV::InvalidGCOV;
   }
 
   /// readFunctionTag - If cursor points to a function tag then increment the
@@ -170,7 +172,7 @@ class GCOVFunction {
 public:
   GCOVFunction() : Ident(0), LineNumber(0) {}
   ~GCOVFunction();
-  bool read(GCOVBuffer &Buffer, GCOVFormat Format);
+  bool read(GCOVBuffer &Buffer, GCOV::GCOVFormat Format);
   void dump();
   void collectLineCounts(FileInfo &FI);
 private:
diff --git a/lib/VMCore/GCOV.cpp b/lib/VMCore/GCOV.cpp
index 003a5d4e4eb..5bc1ac9f5d3 100644
--- a/lib/VMCore/GCOV.cpp
+++ b/lib/VMCore/GCOV.cpp
@@ -28,19 +28,19 @@ GCOVFile::~GCOVFile() {
 }
 
 /// isGCDAFile - Return true if Format identifies a .gcda file.
-static bool isGCDAFile(GCOVFormat Format) {
-  return Format == GCDA_402 || Format == GCDA_404;
+static bool isGCDAFile(GCOV::GCOVFormat Format) {
+  return Format == GCOV::GCDA_402 || Format == GCOV::GCDA_404;
 }
 
 /// isGCNOFile - Return true if Format identifies a .gcno file.
-static bool isGCNOFile(GCOVFormat Format) {
-  return Format == GCNO_402 || Format == GCNO_404;
+static bool isGCNOFile(GCOV::GCOVFormat Format) {
+  return Format == GCOV::GCNO_402 || Format == GCOV::GCNO_404;
 }
 
 /// read - Read GCOV buffer.
 bool GCOVFile::read(GCOVBuffer &Buffer) {
-  GCOVFormat Format = Buffer.readGCOVFormat();
-  if (Format == InvalidGCOV)
+  GCOV::GCOVFormat Format = Buffer.readGCOVFormat();
+  if (Format == GCOV::InvalidGCOV)
     return false;
 
   unsigned i = 0;
@@ -87,21 +87,21 @@ GCOVFunction::~GCOVFunction() {
 
 /// read - Read a aunction from the buffer. Return false if buffer cursor
 /// does not point to a function tag.
-bool GCOVFunction::read(GCOVBuffer &Buff, GCOVFormat Format) {
+bool GCOVFunction::read(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
   if (!Buff.readFunctionTag())
     return false;
 
   Buff.readInt(); // Function header length
   Ident = Buff.readInt(); 
   Buff.readInt(); // Checksum #1
-  if (Format != GCNO_402)
+  if (Format != GCOV::GCNO_402)
     Buff.readInt(); // Checksum #2
 
   Name = Buff.readString();
-  if (Format == GCNO_402 || Format == GCNO_404)
+  if (Format == GCOV::GCNO_402 || Format == GCOV::GCNO_404)
     Filename = Buff.readString();
 
-  if (Format == GCDA_402 || Format == GCDA_404) {
+  if (Format == GCOV::GCDA_402 || Format == GCOV::GCDA_404) {
     Buff.readArcTag();
     uint32_t Count = Buff.readInt() / 2;
     for (unsigned i = 0, e = Count; i != e; ++i) {