diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index c5d3044..228f09c 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -84,4 +84,7 @@
 /* Implemented by libdumpstate_board to dump board-specific info */
 void dumpstate_board();
 
+/* dump eMMC Extended CSD data */
+void dump_emmc_ecsd(const char *ext_csd_path);
+
 #endif /* _DUMPSTATE_H_ */