diff --git a/src/int.rs b/src/int.rs
index f3552d9b12fc..b5fcb534747d 100644
--- a/src/int.rs
+++ b/src/int.rs
@@ -905,6 +905,7 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
         let name_suffix = match self.type_kind(dest_typ) {
             TypeKind::Float => "tisf",
             TypeKind::Double => "tidf",
+            TypeKind::FP128 => "tixf",
             kind => panic!("cannot cast a non-native integer to type {:?}", kind),
         };
         let sign = if signed { "" } else { "un" };