diff --git a/modules/engine/engine.h b/modules/engine/engine.h
index 2ea243d8..e48d93bc 100644
--- a/modules/engine/engine.h
+++ b/modules/engine/engine.h
@@ -204,7 +204,7 @@ void StartFrame_Post();
 		MF_LogError(amx, AMX_ERR_NATIVE, "Entity out of range (%d)", x); \
 		return 0; \
 	} else { \
-		if (x <= gpGlobals->maxClients) { \
+		if (x > 0 && x <= gpGlobals->maxClients) { \
 			if (!MF_IsPlayerIngame(x)) { \
 				MF_LogError(amx, AMX_ERR_NATIVE, "Invalid player %d (not in-game)", x); \
 				return 0; \