diff --git a/lib/ansible/modules/packaging/os/rpm_key.py b/lib/ansible/modules/packaging/os/rpm_key.py
index f6deaff067..fce57f8634 100644
--- a/lib/ansible/modules/packaging/os/rpm_key.py
+++ b/lib/ansible/modules/packaging/os/rpm_key.py
@@ -183,7 +183,7 @@ class RpmKey(object):
 
     def drop_key(self, keyid):
         if not self.module.check_mode:
-            self.execute_command([self.rpm, '--erase', '--allmatches', "gpg-pubkey-%s" % keyid[8:].lower()])
+            self.execute_command([self.rpm, '--erase', '--allmatches', "gpg-pubkey-%s" % keyid[-8:].lower()])
 
 
 def main():