diff --git a/curve_simplify.py b/curve_simplify.py
index 43a9c4b7a7dda790975e1ce9f9f78de2e05e6747..280b7120c15be87a8df79f0b6ca4aee2a6a11e09 100644
--- a/curve_simplify.py
+++ b/curve_simplify.py
@@ -351,7 +351,7 @@ def fcurves_simplify(context, obj, options, fcurves):
                 fcurve_sel[fcurve_i].keyframe_points.remove(fcurve_sel[fcurve_i].keyframe_points[i])
             # put newPoints into fcurve
             for v in newPoints:
-                fcurve_sel[fcurve_i].keyframe_points.add(frame=v[0],value=v[1])
+                fcurve_sel[fcurve_i].keyframe_points.insert(frame=v[0],value=v[1])
             #fcurve.points.foreach_set('co', newPoints)
     return
 
diff --git a/io_import_scene_mhx.py b/io_import_scene_mhx.py
index 273848c1c92b0c773175d866c584165cfecae3d9..3b74484631fdf6fe79eed768bc6ef7f43a260132 100644
--- a/io_import_scene_mhx.py
+++ b/io_import_scene_mhx.py
@@ -693,7 +693,7 @@ def parseAnimDataFCurve(adata, rna, args, tokens):
         elif key == 'FModifier':
             parseFModifier(fcu, val, sub)
         elif key == 'kp':
-            pt = fcu.keyframe_points.add(n, 0)
+            pt = fcu.keyframe_points.insert(n, 0)
             pt.interpolation = 'LINEAR'
             pt = parseKeyFramePoint(pt, val, sub)
             n += 1