diff --git a/src/builder.rs b/src/builder.rs
index 02d46654f04..62bce7eb78c 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -656,7 +656,7 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
     }
 
     fn unchecked_sadd(&mut self, a: RValue<'gcc>, b: RValue<'gcc>) -> RValue<'gcc> {
-        a + b
+        self.gcc_add(a, b)
     }
 
     fn unchecked_uadd(&mut self, a: RValue<'gcc>, b: RValue<'gcc>) -> RValue<'gcc> {