diff --git a/tools/bugpoint/Miscompilation.cpp b/tools/bugpoint/Miscompilation.cpp
index 83054f30b0a..d7c0e2d8ff9 100644
--- a/tools/bugpoint/Miscompilation.cpp
+++ b/tools/bugpoint/Miscompilation.cpp
@@ -248,8 +248,8 @@ static void DisambiguateGlobalSymbols(Module *M) {
       I->setName(Mang.getMangledName(I));
   }
   for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I) {
-    // Don't mangle asm names.
-    if (!I->hasName() || I->getName()[0] != 1)
+    // Don't mangle asm names or intrinsics.
+    if (!I->hasName() || I->getName()[0] != 1 || I->getIntrinsicID() != 0)
       I->setName(Mang.getMangledName(I));
   }
 }