diff --git a/library/packaging/apt_key b/library/packaging/apt_key
index e071833c3be..d5473558801 100644
--- a/library/packaging/apt_key
+++ b/library/packaging/apt_key
@@ -112,7 +112,7 @@ REQUIRED_EXECUTABLES=['gpg', 'grep', 'apt-key']
 def check_missing_binaries(module):
     missing = [e for e in REQUIRED_EXECUTABLES if not find_executable(e)]
     if len(missing):
-        module.fail_json(msg="binaries are missing", names=all)
+        module.fail_json(msg="binaries are missing", names=missing)
 
 def all_keys(module, keyring):
     if keyring: