diff --git a/src/checkpkgaudit/checkpkgaudit.py b/src/checkpkgaudit/checkpkgaudit.py
index 4dc7f0f..5c4c0ce 100644
--- a/src/checkpkgaudit/checkpkgaudit.py
+++ b/src/checkpkgaudit/checkpkgaudit.py
@@ -72,6 +72,8 @@ def pkg_audit(self, jail=None):
             raise nagiosplugin.CheckError(message)
 
         else:
+            if len(stdout.splitlines()) == 0:
+                return 0
             stdout = stdout.splitlines()[-1]
             problems = int(stdout.split()[0])