diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c
index b6b0230e0..0244716e7 100644
--- a/src/smooth/ftgrays.c
+++ b/src/smooth/ftgrays.c
@@ -317,7 +317,6 @@ typedef ptrdiff_t  FT_PtrDist;
 #undef SCALED
 
 #define ONE_PIXEL       ( 1L << PIXEL_BITS )
-#define PIXEL_MASK      ( -1L << PIXEL_BITS )
 #define TRUNC( x )      ( (TCoord)( (x) >> PIXEL_BITS ) )
 #define SUBPIXELS( x )  ( (TPos)(x) << PIXEL_BITS )
 #define FLOOR( x )      ( (x) & -ONE_PIXEL )