diff --git a/openbsc/src/abis_nm.c b/openbsc/src/abis_nm.c
index c3b2c07..2be71f5 100644
--- a/openbsc/src/abis_nm.c
+++ b/openbsc/src/abis_nm.c
@@ -1296,6 +1296,7 @@
 		len = strlen(line_buf)+2;
 		break;
 	default:
+		LOGP(DNM, LOGL_ERROR, "sw_load_segment needs implementation for the BTS.\n");
 		/* FIXME: Other BTS types */
 		return -1;
 	}