diff --git a/r5dev/game/shared/shareddefs.h b/r5dev/game/shared/shareddefs.h
index 1c858927..e896c805 100644
--- a/r5dev/game/shared/shareddefs.h
+++ b/r5dev/game/shared/shareddefs.h
@@ -24,4 +24,20 @@
 #endif // !CLIENT_DLL
 
 
+// ---------------------------
+//  Hit Group standards
+// ---------------------------
+#define HITGROUP_INVALID	-1
+#define	HITGROUP_GENERIC	0
+#define	HITGROUP_HEAD		1
+#define	HITGROUP_CHEST		2
+#define	HITGROUP_STOMACH	3
+#define HITGROUP_LEFTARM	4	
+#define HITGROUP_RIGHTARM	5
+#define HITGROUP_LEFTLEG	6
+#define HITGROUP_RIGHTLEG	7
+#define HITGROUP_GEAR		8			// alerts NPC, but doesn't do damage or bleed (1/100th damage)
+#define HITGROUP_COUNT		9
+
+
 #endif // SHAREDDEFS_H
\ No newline at end of file