diff --git a/pixman/pixman-trap.c b/pixman/pixman-trap.c
index 91766fdbfca02d39d1df910e72e61fe212e87e98..7560405ee2e440d7b655e428949cb8041f859f5d 100644
--- a/pixman/pixman-trap.c
+++ b/pixman/pixman-trap.c
@@ -74,7 +74,7 @@ pixman_sample_floor_y (pixman_fixed_t y,
 
     if (f < Y_FRAC_FIRST (n))
     {
-	if (pixman_fixed_to_int (i) == 0x8000)
+	if (pixman_fixed_to_int (i) == 0xffff8000)
 	{
 	    f = 0; /* saturate */
 	}