diff --git a/include/ntapi/nt_debug.h b/include/ntapi/nt_debug.h
index 4cdd1a4..2d1bb19 100644
--- a/include/ntapi/nt_debug.h
+++ b/include/ntapi/nt_debug.h
@@ -273,7 +273,7 @@ typedef struct _nt_dbg_ui_thread_info {
 
 
 typedef struct _nt_dbg_km_process_info {
-	uint32_t		sussystem_key;
+	uint32_t		subsystem_key;
 	void *			image_handle;
 	void *			image_base;
 	uint32_t		dbginfo_offset;
@@ -285,7 +285,7 @@ typedef struct _nt_dbg_km_process_info {
 typedef struct _nt_dbg_ui_process_info {
 	void *			hprocess;
 	void *			hthread;
-	uint32_t		sussystem_key;
+	uint32_t		subsystem_key;
 	void *			image_handle;
 	void *			image_base;
 	uint32_t		dbginfo_offset;