diff --git a/src/classic/rfcomm.c b/src/classic/rfcomm.c
index 7efead4c3..6ab3294a2 100644
--- a/src/classic/rfcomm.c
+++ b/src/classic/rfcomm.c
@@ -2201,6 +2201,14 @@ static uint8_t rfcomm_channel_create_internal(btstack_packet_handler_t packet_ha
         new_multiplexer = 1;
     }
     
+    // check if channel for this remote service already exists
+    uint8_t dlci = (server_channel << 1) | (multiplexer->outgoing ^ 1);
+    channel = rfcomm_channel_for_multiplexer_and_dlci(multiplexer, dlci);
+    if (channel){
+        status = RFCOMM_CHANNEL_ALREADY_REGISTERED;
+        goto fail;
+    }
+
     // prepare channel
     channel = rfcomm_channel_create(multiplexer, NULL, server_channel);
     if (!channel){