diff --git a/caca/caca_internals.h b/caca/caca_internals.h
index 231d9b8..7dd104b 100644
--- a/caca/caca_internals.h
+++ b/caca/caca_internals.h
@@ -136,7 +136,7 @@ struct caca_display
         caca_event_t last_key_event;
 #endif
 #if defined(USE_WIN32)
-		unsigned char not_empty_struct;
+        unsigned char not_empty_struct;
 #endif
     } events;
 };