diff --git a/hbl.json b/hbl.json
index c62fbbb..fb1a0ea 100644
--- a/hbl.json
+++ b/hbl.json
@@ -119,6 +119,7 @@
                 "svcCreateSharedMemory": "0x50",
                 "svcMapTransferMemory": "0x51",
                 "svcUnmapTransferMemory": "0x52",
+                "svcQueryIoMapping": "0x55",
                 "svcDebugActiveProcess": "0x60",
                 "svcBreakDebugProcess": "0x61",
                 "svcTerminateDebugProcess": "0x62",