diff --git a/api/funkwhale_api/radios/utils.py b/api/funkwhale_api/radios/utils.py
index 32a95bef5c92f73c89bf57d08ca24cc791cfc018..d279e489b90f8ba6334c17fa1bbfb66efe63e9a3 100644
--- a/api/funkwhale_api/radios/utils.py
+++ b/api/funkwhale_api/radios/utils.py
@@ -32,7 +32,7 @@ def get_similar_tracks_mbids_from_mbid(mbid, annoy_similarity):
             "Metric %s is not valid. Must be one of : " + print(VALID_METRICS)
         )
 
-    headers = {"Content-Type': 'application/json"}
+    headers = {"Content-Type": "application/json"}
     endpoint = "acousticbrainz.org/api/v1/similarity"
     similar_tracks_mbids = []
     similar_tracks = requests.get(