diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c
index 8235a94..d982c28 100644
--- a/src/smooth/ftgrays.c
+++ b/src/smooth/ftgrays.c
@@ -239,10 +239,13 @@
 #define FT_ERROR( x )   do { } while ( 0 )     /* nothing */
 #define FT_THROW( e )   FT_ERR_CAT( Smooth_Err_, e )
 
-
 #endif /* !FT_DEBUG_LEVEL_TRACE */
 
 
+#define FT_Trace_Enable()   do { } while ( 0 )  /* nothing */
+#define FT_Trace_Disable()  do { } while ( 0 )  /* nothing */
+
+
 #define FT_DEFINE_OUTLINE_FUNCS( class_,               \
                                  move_to_, line_to_,   \
                                  conic_to_, cubic_to_, \