diff --git a/spacy/cli/convert.py b/spacy/cli/convert.py
index af6ef147c..4e3975bda 100644
--- a/spacy/cli/convert.py
+++ b/spacy/cli/convert.py
@@ -48,7 +48,7 @@ def convert_cli(
     morphology: bool = Opt(False, "--morphology", "-m", help="Enable appending morphology to tags"),
     merge_subtokens: bool = Opt(False, "--merge-subtokens", "-T", help="Merge CoNLL-U subtokens"),
     converter: str = Opt("auto", "--converter", "-c", help=f"Converter: {tuple(CONVERTERS.keys())}"),
-    ner_map: Optional[Path] = Opt(None, "--ner-map", "-N", help="NER tag mapping (as JSON-encoded dict of entity types)", exists=True),
+    ner_map: Optional[Path] = Opt(None, "--ner-map", "-nm", help="NER tag mapping (as JSON-encoded dict of entity types)", exists=True),
     lang: Optional[str] = Opt(None, "--lang", "-l", help="Language (if tokenizer required)"),
     # fmt: on
 ):