diff --git a/builder/kojid b/builder/kojid
index de6859dd..30336370 100755
--- a/builder/kojid
+++ b/builder/kojid
@@ -159,6 +159,10 @@ def main(options, session):
             logger.error('Session expired')
             exit_code = 1
             break
+        except koji.AuthError:
+            logger.error('Authentication error')
+            exit_code = 1
+            break
         except koji.RetryError:
             raise
         except Exception:
diff --git a/util/kojira b/util/kojira
index 51efb376..96d27f5f 100755
--- a/util/kojira
+++ b/util/kojira
@@ -1159,6 +1159,9 @@ def main(options, session):
         except koji.AuthExpired:
             logger.warning("Session expired")
             break
+        except koji.AuthError:
+            logger.warning("Authentication error")
+            break
         except SystemExit:
             logger.warning("Shutting down")
             break