diff --git a/builtin.c b/builtin.c
index c28cd0a..ff3596d 100644
--- a/builtin.c
+++ b/builtin.c
@@ -3892,7 +3892,7 @@ do_typeof(int nargs)
 			res = "unassigned";
 		else if ((arg->flags & STRING) != 0) {
 			res = "string";
-			if ((arg->flags & MAYBE_NUM) != 0)
+			if ((arg->flags & MAYBE_NUM|NUMBER) != 0)
 				res = "strnum";
 		} else if ((arg->flags & NUMBER) != 0)
 			res = "number";