diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index 3ecb302..eaa847a 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -3081,6 +3081,7 @@
   }
 
   assert(0 && "Unknown SCEV type!");
+  return 0;
 }
 
 /// getSCEVAtScope - This is a convenience function which does