diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 8bc5eef..9ed9307 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -605,6 +605,8 @@
 		if (dbg_kdb_mode) {
 			kgdb_connected = 1;
 			error = kdb_stub(ks);
+			if (error == -1)
+				continue;
 			kgdb_connected = 0;
 		} else {
 			error = gdb_serial_stub(ks);