diff --git a/share/tools/create_manpage_completions.py b/share/tools/create_manpage_completions.py
index 8605a16f0..7093f639d 100755
--- a/share/tools/create_manpage_completions.py
+++ b/share/tools/create_manpage_completions.py
@@ -837,6 +837,8 @@ def parse_manpage_at_path(manpage_path, output_directory):
 
     # Clear the output list
     built_command_output[:] = []
+    global already_output_completions
+    already_output_completions = {}
 
     if DEROFF_ONLY:
         parsers = [TypeDeroffManParser()]