diff --git a/lib/Transforms/IPO/StripSymbols.cpp b/lib/Transforms/IPO/StripSymbols.cpp
index c74bad00b55..3bcaee3437f 100644
--- a/lib/Transforms/IPO/StripSymbols.cpp
+++ b/lib/Transforms/IPO/StripSymbols.cpp
@@ -259,8 +259,10 @@ static bool StripDebugInfo(Module &M) {
          ++FI)
       for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
            ++BI) {
-        Changed |= !BI->getDebugLoc().isUnknown();
-        BI->setDebugLoc(DebugLoc());
+        if (!BI->getDebugLoc().isUnknown()) {
+          Changed = true;
+          BI->setDebugLoc(DebugLoc());
+        }
       }
 
   return Changed;