diff --git a/tests/test.c b/tests/test.c
index f84b464..b4e1f6c 100644
--- a/tests/test.c
+++ b/tests/test.c
@@ -42,12 +42,12 @@
 
 
 int
-main (int argc, char **argv)
+main (int argc, const char **argv)
 {
   pam_handle_t *pamh = NULL;
   int rc;
 
-  rc = pam_sm_authenticate (pamh, 0, 1, (const char **) argv);
+  rc = pam_sm_authenticate (pamh, 0, 1, argv);
 
   printf ("rc %d\n", rc);