diff --git a/ChangeLog b/ChangeLog
index b98801a2c..822c521c2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-11-03  Alexei Podtelezhnikov  <apodtele@gmail.com>
+
+	Revert due to specs: [truetype] Speed up variation IUP.
+
 2018-11-02  Alexei Podtelezhnikov  <apodtele@gmail.com>
 
 	* src/truetype/ttgxvar.c (ft_var_get_item_delta): Fixed logic.
diff --git a/src/truetype/ttgxvar.c b/src/truetype/ttgxvar.c
index 407dcae83..ea63a0468 100644
--- a/src/truetype/ttgxvar.c
+++ b/src/truetype/ttgxvar.c
@@ -3514,25 +3514,10 @@
 
       /* If the reference points have the same coordinate but different */
       /* delta, inferred delta is zero.  Otherwise interpolate.         */
-      if ( in1 == in2 || out1 == out2 )
+      if ( in1 != in2 || out1 == out2 )
       {
-        for ( p = p1; p <= p2; p++ )
-        {
-          out = in_points[p].x;
-
-          if ( out <= in1 )
-            out += d1;
-          else if ( out >= in2 )
-            out += d2;
-          else
-            out = out1;
-
-          out_points[p].x = out;
-        }
-      }
-      else
-      {
-        FT_Fixed  scale = FT_DivFix( out2 - out1, in2 - in1 );
+        FT_Fixed  scale = in1 != in2 ? FT_DivFix( out2 - out1, in2 - in1 )
+                                     : 0;
 
 
         for ( p = p1; p <= p2; p++ )