diff --git a/src/crimson/osd/osd.h b/src/crimson/osd/osd.h
index aeea180e033..3c4f894405d 100644
--- a/src/crimson/osd/osd.h
+++ b/src/crimson/osd/osd.h
@@ -37,7 +37,6 @@ class MOSDMap;
 class MOSDRepOpReply;
 class MOSDRepOp;
 class MOSDScrub2;
-class OSDMap;
 class OSDMeta;
 class Heartbeat;