diff --git a/plat/amlogic/gxl/gxl_def.h b/plat/amlogic/gxl/gxl_def.h
index 6f49ed2..1e1a934 100644
--- a/plat/amlogic/gxl/gxl_def.h
+++ b/plat/amlogic/gxl/gxl_def.h
@@ -116,6 +116,7 @@
 
 #define AML_SM_JTAG_ON				U(0x82000040)
 #define AML_SM_JTAG_OFF				U(0x82000041)
+#define AML_SM_GET_CHIP_ID			U(0x82000044)
 
 #define AML_JTAG_STATE_ON			U(0)
 #define AML_JTAG_STATE_OFF			U(1)