diff --git a/SPIRV/SpvBuilder.cpp b/SPIRV/SpvBuilder.cpp
index 6e78b799..dfeae871 100644
--- a/SPIRV/SpvBuilder.cpp
+++ b/SPIRV/SpvBuilder.cpp
@@ -859,12 +859,14 @@ Id Builder::makeFpConstant(Id type, double d, bool specConstant)
                 return makeFloatConstant(d, specConstant);
         case 64:
                 return makeDoubleConstant(d, specConstant);
+        default:
+                break;
         }
 
         assert(false);
+        return NoResult;
 }
 
-
 Id Builder::findCompositeConstant(Op typeClass, const std::vector<Id>& comps)
 {
     Instruction* constant = 0;