diff --git a/artifacts/scripting/headers/sfall.h b/artifacts/scripting/headers/sfall.h
index f948c506..7c0a0023 100644
--- a/artifacts/scripting/headers/sfall.h
+++ b/artifacts/scripting/headers/sfall.h
@@ -290,6 +290,8 @@
 // clears the keyboard input buffer, use it in the HOOK_KEYPRESS hook to clear keyboard events before calling functions that are waiting for keyboard input
 #define clear_keyboard_buffer                           metarule3(201, 0, 0, 0)
 
+// checks if the specified PID number exists in the list of registered protos
+#define check_pid(pid)                                  (get_proto_data(pid, 0) != -1)
 
 /* sfall_funcX macros */
 #define add_extra_msg_file(name)                                sfall_func1("add_extra_msg_file", name)
@@ -365,7 +367,6 @@
 #define overlay_clear(winType)                                  sfall_func2("interface_overlay", winType, 2)
 #define overlay_clear_rectangle(winType, x, y, w, h)            sfall_func6("interface_overlay", winType, 2, x, y, w, h)
 #define overlay_destroy(winType)                                sfall_func2("interface_overlay", winType, 0)
-#define proto_exists(pid)                                       sfall_func1("proto_exists", pid)
 #define real_dude_obj                                           sfall_func0("real_dude_obj")
 #define remove_all_timer_events                                 sfall_func0("remove_timer_event")
 #define remove_timer_event(fixedParam)                          sfall_func1("remove_timer_event", fixedParam)
diff --git a/artifacts/scripting/sfall function notes.txt b/artifacts/scripting/sfall function notes.txt
index 294c9215..990dacc1 100644
--- a/artifacts/scripting/sfall function notes.txt	
+++ b/artifacts/scripting/sfall function notes.txt	
@@ -796,9 +796,6 @@ optional arguments:
 - gvarNumber: the number of the global variable controlling the quest
 - thresholdValue: the value of the global variable at which the quest is counted as a failure
 
-> bool sfall_func1("proto_exists", int pid)
-- returns True if the specified PID number exists in the list of registered protos
-
 ------------------------
 ------ MORE INFO -------
 ------------------------
diff --git a/sfall/FalloutEngine/EngineUtils.cpp b/sfall/FalloutEngine/EngineUtils.cpp
index 2071a615..bd18c3b8 100644
--- a/sfall/FalloutEngine/EngineUtils.cpp
+++ b/sfall/FalloutEngine/EngineUtils.cpp
@@ -102,7 +102,6 @@ bool CheckProtoID(DWORD pid) {
 	if (pid == 0) return false;
 	long type = pid >> 24;
 	if (type > fo::ObjType::OBJ_TYPE_MISC) return false;
-
 	return (static_cast<long>(pid & 0xFFFF) < fo::var::protoLists[type].totalCount);
 }
 
diff --git a/sfall/Modules/Scripting/Handlers/Metarule.cpp b/sfall/Modules/Scripting/Handlers/Metarule.cpp
index 0c517ec6..513d70e5 100644
--- a/sfall/Modules/Scripting/Handlers/Metarule.cpp
+++ b/sfall/Modules/Scripting/Handlers/Metarule.cpp
@@ -121,7 +121,6 @@ static const SfallMetarule metarules[] = {
 	{"obj_under_cursor",        mf_obj_under_cursor,        2, 2,  0, {ARG_INT, ARG_INT}},
 	{"objects_in_radius",       mf_objects_in_radius,       3, 4,  0, {ARG_INT, ARG_INT, ARG_INT, ARG_INT}},
 	{"outlined_object",         mf_outlined_object,         0, 0},
-	{"proto_exists",            mf_proto_exists,            1, 1,  0, {ARG_INT}},
 	{"real_dude_obj",           mf_real_dude_obj,           0, 0},
 	{"remove_timer_event",      mf_remove_timer_event,      0, 1, -1, {ARG_INT}},
 	{"set_can_rest_on_map",     mf_set_rest_on_map,         3, 3, -1, {ARG_INT, ARG_INT, ARG_INT}},
diff --git a/sfall/Modules/Scripting/Handlers/Objects.cpp b/sfall/Modules/Scripting/Handlers/Objects.cpp
index a554dbc4..6990e725 100644
--- a/sfall/Modules/Scripting/Handlers/Objects.cpp
+++ b/sfall/Modules/Scripting/Handlers/Objects.cpp
@@ -446,17 +446,13 @@ void mf_get_loot_object(OpcodeContext& ctx) {
 	ctx.setReturn((GetLoopFlags() & INTFACELOOT) ? fo::var::target_stack[fo::var::target_curr_stack] : 0);
 }
 
-void mf_proto_exists(OpcodeContext& ctx) {
-	ctx.setReturn(fo::CheckProtoID(ctx.arg(0).rawValue()));
-}
-
 static bool protoMaxLimitPatch = false;
 
 void op_get_proto_data(OpcodeContext& ctx) {
+	long result = -1;
 	fo::Proto* protoPtr;
 	int pid = ctx.arg(0).rawValue();
-	int result = fo::func::proto_ptr(pid, &protoPtr);
-	if (result != -1) {
+	if (fo::CheckProtoID(pid) && fo::func::proto_ptr(pid, &protoPtr) != result) {
 		result = *(long*)((BYTE*)protoPtr + ctx.arg(1).rawValue());
 	} else {
 		ctx.printOpcodeError(protoFailedLoad, ctx.getOpcodeName(), pid);
@@ -466,7 +462,7 @@ void op_get_proto_data(OpcodeContext& ctx) {
 
 void op_set_proto_data(OpcodeContext& ctx) {
 	int pid = ctx.arg(0).rawValue();
-	if (CritterStats::SetProtoData(pid, ctx.arg(1).rawValue(), ctx.arg(2).rawValue()) != -1) {
+	if (fo::CheckProtoID(pid) && CritterStats::SetProtoData(pid, ctx.arg(1).rawValue(), ctx.arg(2).rawValue()) != -1) {
 		if (!protoMaxLimitPatch) {
 			Objects::LoadProtoAutoMaxLimit();
 			protoMaxLimitPatch = true;
diff --git a/sfall/Modules/Scripting/Handlers/Objects.h b/sfall/Modules/Scripting/Handlers/Objects.h
index a3b43f18..ba1d8d7e 100644
--- a/sfall/Modules/Scripting/Handlers/Objects.h
+++ b/sfall/Modules/Scripting/Handlers/Objects.h
@@ -89,8 +89,6 @@ void mf_obj_under_cursor(OpcodeContext&);
 
 void mf_get_loot_object(OpcodeContext&);
 
-void mf_proto_exists(OpcodeContext&);
-
 void op_get_proto_data(OpcodeContext&);
 
 void op_set_proto_data(OpcodeContext&);