diff --git a/components/crashcatcher/windowscrashshm.hpp b/components/crashcatcher/windowscrashshm.hpp
index 6ac09234ba..1a88f05662 100644
--- a/components/crashcatcher/windowscrashshm.hpp
+++ b/components/crashcatcher/windowscrashshm.hpp
@@ -40,6 +40,8 @@ namespace Crash
             HANDLE mSignalApp;
             HANDLE mSignalMonitor;
             HANDLE mShmMutex;
+            // the size defines are in UTF-16 code units, and lots of things use more UTF-8 code units, so this may explode with really long non-ASCII paths
+            // we can't switch to wchar_t as when we've made this struct bigger in the past, things exploded
             char mDumpDirectoryPath[MAX_LONG_PATH];
             char mCrashDumpFileName[MAX_FILENAME];
             char mFreezeDumpFileName[MAX_FILENAME];