diff --git a/src/main/java/org/jvnet/libpam/PAM.java b/src/main/java/org/jvnet/libpam/PAM.java
index eb53ece..bd8d934 100644
--- a/src/main/java/org/jvnet/libpam/PAM.java
+++ b/src/main/java/org/jvnet/libpam/PAM.java
@@ -124,8 +124,7 @@ public UnixUser authenticate(String username, String password) throws PAMExcepti
             check(libpam.pam_set_item(pht,PAM_USER,username),"pam_set_item failed");
             check(libpam.pam_authenticate(pht,0),"pam_authenticate failed");
             check(libpam.pam_setcred(pht,0),"pam_setcred failed");
-            // several different error code seem to be used to represent authentication failures
-//            check(libpam.pam_acct_mgmt(pht,0),"pam_acct_mgmt failed");
+            check(libpam.pam_acct_mgmt(pht,0),"pam_acct_mgmt failed");
 
             PointerByReference r = new PointerByReference();
             check(libpam.pam_get_item(pht,PAM_USER,r),"pam_get_item failed");