diff --git a/com.unity.ml-agents/CHANGELOG.md b/com.unity.ml-agents/CHANGELOG.md
index 4e1acad93e..1e43302099 100755
--- a/com.unity.ml-agents/CHANGELOG.md
+++ b/com.unity.ml-agents/CHANGELOG.md
@@ -52,6 +52,7 @@ and this project adheres to
 - Removed unnecessary memory allocations in `SideChannelManager.GetSideChannelMessage()` (#4886)
 - Removed several memory allocations that happened during inference. On a test scene, this
   reduced the amount of memory allocated by approximately 25%. (#4887)
+- Properly catch permission errors when writing timer files. (#4921)
 
 #### ml-agents / ml-agents-envs / gym-unity (Python)
 - Fixed a bug that would cause an exception when `RunOptions` was deserialized via `pickle`. (#4842)
diff --git a/com.unity.ml-agents/Runtime/Timer.cs b/com.unity.ml-agents/Runtime/Timer.cs
index d779deb650..446d780af7 100644
--- a/com.unity.ml-agents/Runtime/Timer.cs
+++ b/com.unity.ml-agents/Runtime/Timer.cs
@@ -477,9 +477,9 @@ public void SaveJsonTimers(string filename = null)
                 SaveJsonTimers(fs);
                 fs.Close();
             }
-            catch (IOException)
+            catch (SystemException)
             {
-                // It's possible we don't have write access to the directory.
+                // We may not have write access to the directory.
                 Debug.LogWarning($"Unable to save timers to file {filename}");
             }
 #endif