diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 5de21504783..c5d2aa078aa 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -616,6 +616,9 @@ AsmParser::ApplyModifierToExpr(const MCExpr *E,
     return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
   }
   }
+
+  assert(0 && "Invalid expression kind!");
+  return 0;
 }
 
 /// ParseExpression - Parse an expression and return it.