diff --git a/wlroots/wlr_types/compositor.py b/wlroots/wlr_types/compositor.py
index 8f3232d9..acfdd524 100644
--- a/wlroots/wlr_types/compositor.py
+++ b/wlroots/wlr_types/compositor.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Final
 from weakref import WeakKeyDictionary
 
 from pywayland.protocol.wayland import WlOutput
@@ -19,7 +19,7 @@
     from wlroots.renderer import Renderer
 
 
-COMPOSITOR_VERSION = 5
+_MAX_COMPOSITOR_VERSION: Final = 5
 
 
 class Compositor(Ptr):
@@ -35,9 +35,9 @@ def __init__(
         :param renderer:
             The wlroots renderer to attach the compositor to.
         """
-        if not version <= COMPOSITOR_VERSION:
+        if not 0 < version <= _MAX_COMPOSITOR_VERSION:
             raise ValueError(
-                f"Compositor version must be less than or equal to {COMPOSITOR_VERSION}"
+                f"Invalid compositor version, should be a value between 1 (inclusive) and {_MAX_COMPOSITOR_VERSION} (inclusive), got: {version}"
             )
         if renderer is None:
             self._ptr = lib.wlr_compositor_create(display._ptr, version, ffi.NULL)
diff --git a/wlroots/wlr_types/layer_shell_v1.py b/wlroots/wlr_types/layer_shell_v1.py
index f3f19074..ec8c75af 100644
--- a/wlroots/wlr_types/layer_shell_v1.py
+++ b/wlroots/wlr_types/layer_shell_v1.py
@@ -3,7 +3,7 @@
 
 import enum
 from dataclasses import dataclass
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Final
 from weakref import WeakKeyDictionary
 
 from pywayland.server import Signal
@@ -197,14 +197,16 @@ def surface_at(self, sx: float, sy: float) -> tuple[Surface | None, float, float
         return Surface(surface_ptr), sub_x_data[0], sub_y_data[0]
 
 
-LAYER_SHELL_VERSION = 4
+_MAX_LAYER_SHELL_VERSION: Final = 4
 
 
 class LayerShellV1(PtrHasData):
     def __init__(self, display: Display, version: int) -> None:
         """Create an wlr_xdg_output_manager_v1"""
-        if not 0 < version <= LAYER_SHELL_VERSION:
-            raise ValueError("Invalid layer shell version.")
+        if not 0 < version <= _MAX_LAYER_SHELL_VERSION:
+            raise ValueError(
+                f"Invalid layer shell version, should be a value between 1 (inclusive) and {_MAX_LAYER_SHELL_VERSION} (inclusive), got: {version}"
+            )
 
         self._ptr = lib.wlr_layer_shell_v1_create(display._ptr, version)