diff --git a/ia-cdx-search b/ia-cdx-search
index 3d023e8..61684f1 100755
--- a/ia-cdx-search
+++ b/ia-cdx-search
@@ -72,7 +72,7 @@ async def main(query, concurrency = 1, startPage = None, numPages = None):
 
 
 args = sys.argv[1:]
-if len(args) not in (2, 3, 4) or args[0].lower() in ('-h', '--help') or re.search(r'(^|&)(output|limit|resumekey|showresumekey|page|shownumpages)=', args[0], re.IGNORECASE):
+if not 1 <= len(args) <= 4 or args[0].lower() in ('-h', '--help') or re.search(r'(^|&)(output|limit|resumekey|showresumekey|page|shownumpages)=', args[0], re.IGNORECASE):
 	print('Usage: ia-cdx-search QUERY [CONCURRENCY] [PAGE NUMPAGES]', file = sys.stderr)
 	print('Please refer to https://github.com/internetarchive/wayback/tree/master/wayback-cdx-server for the relevant query parameters', file = sys.stderr)
 	print('The output, limit, resumeKey, showResumeKey, page, and showNumPages parameters must not be included.', file = sys.stderr)