diff --git a/components/bt/host/bluedroid/btc/profile/std/sdp/btc_sdp.c b/components/bt/host/bluedroid/btc/profile/std/sdp/btc_sdp.c
index d41ffb2debe8..7dc42ce0972a 100644
--- a/components/bt/host/bluedroid/btc/profile/std/sdp/btc_sdp.c
+++ b/components/bt/host/bluedroid/btc/profile/std/sdp/btc_sdp.c
@@ -286,7 +286,7 @@ static int free_sdp_slot(int id)
         handle = -1;
     }
     osi_free(slot);
-    slot = NULL;
+    sdp_local_param.sdp_slots[id] = NULL;
 
     return handle;
 }