diff --git a/src/common/impl/FFPlatform_windows.c b/src/common/impl/FFPlatform_windows.c
index e352af140..e483071e0 100644
--- a/src/common/impl/FFPlatform_windows.c
+++ b/src/common/impl/FFPlatform_windows.c
@@ -145,7 +145,7 @@ static void getUserName(FFPlatform* platform) {
     PLSA_UNICODE_STRING userName = NULL;
     if (NT_SUCCESS(LsaGetUserName(&userName, NULL))) {
         ffStrbufSetNWS(&platform->userName, userName->Length / sizeof(wchar_t), userName->Buffer);
-        RtlFreeUnicodeString(userName);
+        RtlFreeUnicodeString(userName); // Required. userName.Buffer is allocated separately
         LsaFreeMemory(userName);
     } else {
         ffStrbufSetS(&platform->userName, getenv("USERNAME"));