diff --git a/ir/irtype.cpp b/ir/irtype.cpp
index 0836def1..44d29f3a 100644
--- a/ir/irtype.cpp
+++ b/ir/irtype.cpp
@@ -112,10 +112,10 @@ const llvm::Type * IrTypeBasic::basic2llvm(Type* t)
 
     case Tbool:
         return llvm::Type::getInt1Ty(ctx);
+    default:
+        assert(0 && "not basic type");
+        return NULL;
     }
-
-    assert(0 && "not basic type");
-    return NULL;
 }
 
 //////////////////////////////////////////////////////////////////////////////