diff --git a/channels/rdpgfx/client/rdpgfx_codec.h b/channels/rdpgfx/client/rdpgfx_codec.h
index ef519edae..c1a05388c 100644
--- a/channels/rdpgfx/client/rdpgfx_codec.h
+++ b/channels/rdpgfx/client/rdpgfx_codec.h
@@ -30,7 +30,7 @@
 
 #include "rdpgfx_main.h"
 
-FREERDP_LOCAL
+WINPR_ATTR_NODISCARD
 FREERDP_LOCAL UINT rdpgfx_decode(RDPGFX_PLUGIN* gfx, RDPGFX_SURFACE_COMMAND* cmd);
 
 #endif /* FREERDP_CHANNEL_RDPGFX_CLIENT_CODEC_H */