diff --git a/support/tools/TableGen/InstrSelectorEmitter.cpp b/support/tools/TableGen/InstrSelectorEmitter.cpp
index 2db6da4bd2f..8bc8f611dd2 100644
--- a/support/tools/TableGen/InstrSelectorEmitter.cpp
+++ b/support/tools/TableGen/InstrSelectorEmitter.cpp
@@ -401,6 +401,7 @@ std::string Pattern::getSlotName(Record *R) {
   } else {
     assert(0 && "Don't know how to get a slot name for this!");
   }
+  return "";
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/utils/TableGen/InstrSelectorEmitter.cpp b/utils/TableGen/InstrSelectorEmitter.cpp
index 2db6da4bd2f..8bc8f611dd2 100644
--- a/utils/TableGen/InstrSelectorEmitter.cpp
+++ b/utils/TableGen/InstrSelectorEmitter.cpp
@@ -401,6 +401,7 @@ std::string Pattern::getSlotName(Record *R) {
   } else {
     assert(0 && "Don't know how to get a slot name for this!");
   }
+  return "";
 }
 
 //===----------------------------------------------------------------------===//