diff --git a/lib/Bitcode/Reader/Deserialize.cpp b/lib/Bitcode/Reader/Deserialize.cpp
index 2014557a101..99e9cdb152c 100644
--- a/lib/Bitcode/Reader/Deserialize.cpp
+++ b/lib/Bitcode/Reader/Deserialize.cpp
@@ -85,7 +85,7 @@ bool Deserializer::AdvanceStream() {
         
       case bitc::END_BLOCK: {
         bool x = Stream.ReadBlockEnd();
-        assert(!x && "Error at block end."); x=x;
+        assert(!x && "Error at block end.");
         BlockStack.pop_back();
         continue;
       }