diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index c6df129..e48a820 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -6239,6 +6239,10 @@
     }
 #endif /* TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY */
 
+    if ( exc->zp0.org[exc->GS.rp0].y == 0 ||
+         exc->zp0.tags[exc->GS.rp0] & FT_CURVE_TAG_TOUCH_Y )
+      distance = org_dist;
+
     exc->func_move( exc, &exc->zp1, point, distance - cur_dist );
 
 #ifdef TT_SUPPORT_SUBPIXEL_HINTING_INFINALITY