1 files changed, 3 insertions, 1 deletions
diff --git a/src/who.c b/src/who.c
index 2cdbc5712..fff874ddb 100644
--- a/src/who.c
+++ b/src/who.c
@@ -291,7 +291,9 @@ list_entries_who (n)
 #ifdef USERS
 
 static int
-userid_compare (const void *v_a, const void *v_b)
+userid_compare (v_a, v_b)
+     const void *v_a;
+     const void *v_b;
 {
   char **a = (char **) v_a;
   char **b = (char **) v_b;