diff --git a/src/groups.c b/src/groups.c
index f7bbe5cd..cbb7fc11 100644
--- a/src/groups.c
+++ b/src/groups.c
@@ -45,7 +45,7 @@
 static char *Prog;
 
 /* local function prototypes */
-static void print_groups (const char *);
+static void print_groups (const char *member);
 
 /*
  * print_groups - print the groups which the named user is a member of