3 files changed, 3 insertions, 3 deletions
diff --git a/modules/pam_unix/pam_unix_acct.c b/modules/pam_unix/pam_unix_acct.c
index 6894cd09..cb2550df 100644
--- a/modules/pam_unix/pam_unix_acct.c
+++ b/modules/pam_unix/pam_unix_acct.c
@@ -170,7 +170,7 @@ struct spwd *_unix_run_verify_binary(pam_handle_t *pamh, unsigned int ctrl, cons
     }
     close(fds[0]);
   }
-  if (sighandler != NULL) {
+  if (sighandler != SIG_ERR) {
     (void) signal(SIGCHLD, sighandler);   /* restore old signal handler */
   }
   D(("Returning %d",retval));
diff --git a/modules/pam_unix/pam_unix_passwd.c b/modules/pam_unix/pam_unix_passwd.c
index da96d3df..dcd123c8 100644
--- a/modules/pam_unix/pam_unix_passwd.c
+++ b/modules/pam_unix/pam_unix_passwd.c
@@ -309,7 +309,7 @@ static int _unix_run_shadow_binary(pam_handle_t *pamh, unsigned int ctrl, const
 	retval = PAM_AUTH_ERR;
     }
 
-    if (sighandler != NULL) {
+    if (sighandler != SIG_ERR) {
         (void) signal(SIGCHLD, sighandler);   /* restore old signal handler */
     }
 
diff --git a/modules/pam_unix/support.c b/modules/pam_unix/support.c
index 2dc49b80..b695b8db 100644
--- a/modules/pam_unix/support.c
+++ b/modules/pam_unix/support.c
@@ -565,7 +565,7 @@ static int _unix_run_helper_binary(pam_handle_t *pamh, const char *passwd,
 	retval = PAM_AUTH_ERR;
     }
 
-    if (sighandler != NULL) {
+    if (sighandler != SIG_ERR) {
         (void) signal(SIGCHLD, sighandler);   /* restore old signal handler */
     }