diff --git a/lib/Target/TargetLoweringObjectFile.cpp b/lib/Target/TargetLoweringObjectFile.cpp
index 8e1351b..ff0180b 100644
--- a/lib/Target/TargetLoweringObjectFile.cpp
+++ b/lib/Target/TargetLoweringObjectFile.cpp
@@ -304,6 +304,8 @@
 
 void TargetLoweringObjectFileELF::Initialize(MCContext &Ctx,
                                              const TargetMachine &TM) {
+  if (UniquingMap != 0)
+    ((ELFUniqueMapTy*)UniquingMap)->clear();
   TargetLoweringObjectFile::Initialize(Ctx, TM);
 
   BSSSection = 
@@ -666,6 +668,8 @@
 
 void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                                const TargetMachine &TM) {
+  if (UniquingMap != 0)
+    ((MachOUniqueMapTy*)UniquingMap)->clear();
   TargetLoweringObjectFile::Initialize(Ctx, TM);
   
   TextSection // .text
@@ -946,6 +950,8 @@
 
 void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
                                               const TargetMachine &TM) {
+  if (UniquingMap != 0)
+    ((COFFUniqueMapTy*)UniquingMap)->clear();
   TargetLoweringObjectFile::Initialize(Ctx, TM);
   TextSection = getCOFFSection("\t.text", true, SectionKind::getText());
   DataSection = getCOFFSection("\t.data", true, SectionKind::getDataRel());