diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index f0cad90d40..c2ad49e954 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -114,6 +114,7 @@ func buildssa(fn *Node) (ssafn *ssa.Func, usessa bool) {
 
 	// fallthrough to exit
 	if b := s.endBlock(); b != nil {
+		b.Kind = ssa.BlockRet
 		b.AddEdgeTo(s.exit)
 	}