diff --git a/src/cmd/5g/gsubr.c b/src/cmd/5g/gsubr.c
index 74266cb15f..80a173404c 100644
--- a/src/cmd/5g/gsubr.c
+++ b/src/cmd/5g/gsubr.c
@@ -1143,7 +1143,7 @@ gregshift(int as, Node *lhs, int32 stype, Node *reg, Node *rhs)
 
 // Generate an instruction referencing *n
 // to force segv on nil pointer dereference.
-bsdvoid
+void
 checkref(Node *n)
 {
 	Node m1, m2;