diff --git a/src/CommandFormats.hh b/src/CommandFormats.hh
index dd1f3a83..fe5aa0fb 100644
--- a/src/CommandFormats.hh
+++ b/src/CommandFormats.hh
@@ -3914,7 +3914,7 @@ struct G_SwitchStateChanged_6x05 {
   G_ObjectIDHeader header;
   // TODO: Some of these might be big-endian on GC; it only byteswaps
   // switch_flag_num. Are the others actually uint16, or are they uint8[2]?
-  le_uint16_t unknown_a1 = 0;
+  le_uint16_t client_id = 0;
   le_uint16_t unknown_a2 = 0;
   le_uint16_t switch_flag_num = 0;
   uint8_t switch_flag_floor = 0;