diff --git a/libqservice/IQService.h b/libqservice/IQService.h
index d25a06d..bf4343a 100644
--- a/libqservice/IQService.h
+++ b/libqservice/IQService.h
@@ -74,6 +74,7 @@
         GET_BW_TRANSACTION_STATUS = 32, //Client can query BW transaction status.
         SET_LAYER_MIXER_RESOLUTION = 33, // Enables client to set layer mixer resolution.
         SET_COLOR_MODE = 34, // Overrides the QDCM mode on the display
+        GET_HDR_CAPABILITIES = 35, // Get HDR capabilities for legacy HWC interface
         COMMAND_LIST_END = 400,
     };