diff --git a/src/gsm/cbsp.c b/src/gsm/cbsp.c
index 6ddef33..2037f7c 100644
--- a/src/gsm/cbsp.c
+++ b/src/gsm/cbsp.c
@@ -1460,12 +1460,7 @@
 		}
 	}
 	/* else: complete message received */
-	rc = msgb_l2len(msg);
-	if (rc == 0) {
-		/* drop empty message */
-		rc = -EAGAIN;
-		goto discard_msg;
-	}
+	rc = msgb_length(msg);
 	if (tmp_msg)
 		*tmp_msg = NULL;
 	*rmsg = msg;