diff --git a/kcheckpass/checkpass_pam.c b/kcheckpass/checkpass_pam.c
--- a/kcheckpass/checkpass_pam.c
+++ b/kcheckpass/checkpass_pam.c
@@ -119,14 +119,6 @@
   &PAM_data
 };
 
-#ifdef PAM_FAIL_DELAY
-static void
-fail_delay(int retval ATTR_UNUSED, unsigned usec_delay ATTR_UNUSED, 
-	   void *appdata_ptr ATTR_UNUSED)
-{}
-#endif
-
-
 AuthReturn Authenticate(const char *method,
         const char *user, char *(*conv) (ConvRequest, const char *))
 {
@@ -162,7 +154,7 @@
   }
 
 # ifdef PAM_FAIL_DELAY
-  pam_set_item (pamh, PAM_FAIL_DELAY, (void *)fail_delay);
+  pam_set_item (pamh, PAM_FAIL_DELAY, NULL);
 # endif
 
   pam_error = pam_authenticate(pamh, 0);