diff --git a/reactos/base/applications/games/solitaire/lang/bg-bg.rc b/reactos/base/applications/games/solitaire/lang/bg-BG.rc
similarity index 100%
rename from reactos/base/applications/games/solitaire/lang/bg-bg.rc
rename to reactos/base/applications/games/solitaire/lang/bg-BG.rc