diff --git a/src/Camera.c b/src/Camera.c
index 879cd9fe2..0d957f3f9 100644
--- a/src/Camera.c
+++ b/src/Camera.c
@@ -307,7 +307,7 @@ void Camera_CycleActive(void) {
 	if (Camera.Active == &cam_FirstPerson) cycle = 0;
 	else if (Camera.Active == &cam_ThirdPerson) cycle = 1;
 	else if (cam_isForwardThird) cycle = 2;
-	CPE_SendNotifyAction(7, cycle);
+	CPE_SendNotifyAction(NOTIFY_ACTION_THIRD_PERSON_CHANGED, cycle);
 
 	/* reset rotation offset when changing cameras */
 	cam_rotOffset.x = 0.0f; cam_rotOffset.y = 0.0f;
diff --git a/src/Inventory.c b/src/Inventory.c
index 188433be2..817a0b725 100644
--- a/src/Inventory.c
+++ b/src/Inventory.c
@@ -46,7 +46,7 @@ void Inventory_SetSelectedBlock(BlockID block) {
 
 	Inventory_Set(Inventory.SelectedIndex, block);
 	Event_RaiseVoid(&UserEvents.HeldBlockChanged);
-	CPE_SendNotifyAction(0, block);
+	CPE_SendNotifyAction(NOTIFY_ACTION_BLOCK_LIST_SELECTED, block);
 }
 
 void Inventory_PickBlock(BlockID block) {
diff --git a/src/Menus.c b/src/Menus.c
index 25f117daa..f01696b4e 100644
--- a/src/Menus.c
+++ b/src/Menus.c
@@ -1409,14 +1409,14 @@ static void SaveLevelScreen_Save(void* screen, void* widget) {
 	SaveLevelScreen_RemoveOverwrites(s);
 	if ((res = SaveLevelScreen_SaveMap(&path))) return;
 	Chat_Add1("&eSaved map to: %s", &path);
-	CPE_SendNotifyAction(2, 0);
+	CPE_SendNotifyAction(NOTIFY_ACTION_LEVEL_SAVED, 0);
 }
 
 static void SaveLevelScreen_UploadCallback(const cc_string* path) {
 	cc_result res = SaveLevelScreen_SaveMap(path);
 	if (!res) {
 		Chat_Add1("&eSaved map to: %s", path);
-		CPE_SendNotifyAction(2, 0);
+		CPE_SendNotifyAction(NOTIFY_ACTION_LEVEL_SAVED, 0);
 	}
 }
 
@@ -1562,7 +1562,7 @@ static void TexturePackScreen_EntryClick(void* screen, void* widget) {
 	TexturePack_Url.length = 0;
 	res = TexturePack_ExtractCurrent(true);
 
-	CPE_SendNotifyAction(5, 0);
+	CPE_SendNotifyAction(NOTIFY_ACTION_TEXTURE_PACK_CHANGED, 0);
 
 	/* FileNotFound error may be because user deleted .zips from disc */
 	if (res != ReturnCode_FileNotFound) return;
@@ -2742,8 +2742,8 @@ static void TexPackOverlay_YesClick(void* screen, void* widget) {
 	if (TexPackOverlay_IsAlways(s, widget)) TextureCache_Accept(&s->url);
 	Gui_Remove((struct Screen*)s);
 
-	if (TexPackOverlay_IsAlways(s, widget)) CPE_SendNotifyAction(6, 3);
-	else CPE_SendNotifyAction(6, 2);
+	if (TexPackOverlay_IsAlways(s, widget)) CPE_SendNotifyAction(NOTIFY_ACTION_TEXTURE_PROMPT_RESPONDED, 3);
+	else CPE_SendNotifyAction(NOTIFY_ACTION_TEXTURE_PROMPT_RESPONDED, 2);
 }
 
 static void TexPackOverlay_NoClick(void* screen, void* widget) {
@@ -2758,8 +2758,8 @@ static void TexPackOverlay_ConfirmNoClick(void* screen, void* b) {
 	if (s->alwaysDeny) TextureCache_Deny(&s->url);
 	Gui_Remove((struct Screen*)s);
 
-	if (s->alwaysDeny) CPE_SendNotifyAction(6, 0);
-	else CPE_SendNotifyAction(6, 1);
+	if (s->alwaysDeny) CPE_SendNotifyAction(NOTIFY_ACTION_TEXTURE_PROMPT_RESPONDED, 0);
+	else CPE_SendNotifyAction(NOTIFY_ACTION_TEXTURE_PROMPT_RESPONDED, 1);
 }
 
 static void TexPackOverlay_GoBackClick(void* screen, void* b) {
diff --git a/src/Protocol.h b/src/Protocol.h
index fb97ab2b0..a85b36b9f 100644
--- a/src/Protocol.h
+++ b/src/Protocol.h
@@ -50,6 +50,11 @@ enum PROTOCOL_VERSION_ {
 	PROTOCOL_0020 = 6, PROTOCOL_0030 = 7,
 };
 
+enum NOTIFY_ACTION_TYPE {
+	NOTIFY_ACTION_BLOCK_LIST_SELECTED = 0, NOTIFY_ACTION_BLOCK_LIST_TOGGLED = 1, NOTIFY_ACTION_LEVEL_SAVED = 2,
+	NOTIFY_ACTION_RESPAWNED = 3, NOTIFY_ACTION_SPAWN_UPDATED = 4, NOTIFY_ACTION_TEXTURE_PACK_CHANGED = 5,
+	NOTIFY_ACTION_TEXTURE_PROMPT_RESPONDED = 6, NOTIFY_ACTION_THIRD_PERSON_CHANGED = 7
+};
 
 typedef void (*Net_Handler)(cc_uint8* data);
 #define Net_Set(opcode, handler, size) Protocol.Handlers[opcode] = handler; Protocol.Sizes[opcode] = size;
diff --git a/src/Screens.c b/src/Screens.c
index 8d5a9481d..213fe7052 100644
--- a/src/Screens.c
+++ b/src/Screens.c
@@ -1732,11 +1732,11 @@ static int InventoryScreen_KeyDown(void* screen, int key, struct InputDevice* de
 	/* Accuracy: Original classic doesn't close inventory menu when B is pressed */
 	if (InputBind_Claims(BIND_INVENTORY, key, device) && s->releasedInv && !Game_ClassicMode) {
 		Gui_Remove((struct Screen*)s);
-		CPE_SendNotifyAction(1, 0);
+		CPE_SendNotifyAction(NOTIFY_ACTION_BLOCK_LIST_TOGGLED, 0);
 	} else if (InputDevice_IsEnter(key, device) && table->selectedIndex != -1) {
 		Inventory_SetSelectedBlock(table->blocks[table->selectedIndex]);
 		Gui_Remove((struct Screen*)s);
-		CPE_SendNotifyAction(1, 0);
+		CPE_SendNotifyAction(NOTIFY_ACTION_BLOCK_LIST_TOGGLED, 0);
 	} else if (Elem_HandlesKeyDown(table, key, device)) {
 	} else {
 		return Elem_HandlesKeyDown(&HUDScreen_Instance.hotbar, key, device);
@@ -1768,7 +1768,7 @@ static int InventoryScreen_PointerDown(void* screen, int id, int x, int y) {
 		hotbar = Input_IsCtrlPressed() || Input_IsShiftPressed();
 		if (!hotbar) {
 			Gui_Remove((struct Screen*)s);
-			CPE_SendNotifyAction(1, 0);
+			CPE_SendNotifyAction(NOTIFY_ACTION_BLOCK_LIST_TOGGLED, 0);
 		}
 	}
 	return TOUCH_TYPE_GUI;
@@ -1813,7 +1813,7 @@ void InventoryScreen_Show(void) {
 
 	s->VTABLE = &InventoryScreen_VTABLE;
 	Gui_Add((struct Screen*)s, GUI_PRIORITY_INVENTORY);
-	CPE_SendNotifyAction(1, 1);
+	CPE_SendNotifyAction(NOTIFY_ACTION_BLOCK_LIST_TOGGLED, 1);
 }