diff --git a/io_scene_fbx/__init__.py b/io_scene_fbx/__init__.py
index 01332a6b54095772dd26d5aadcd31c54a40e158f..724001e50aa46102a51d02b2d1645772c95e9967 100644
--- a/io_scene_fbx/__init__.py
+++ b/io_scene_fbx/__init__.py
@@ -152,7 +152,7 @@ class ExportFBX(bpy.types.Operator, ExportHelper):
             description="Remove double keyframes",
             default=True,
             )
-    anim_optimize_precission = FloatProperty(
+    anim_optimize_precision = FloatProperty(
             name="Precision",
             description=("Tolerence for comparing double keyframes "
                         "(higher for greater accuracy)"),
diff --git a/io_scene_fbx/export_fbx.py b/io_scene_fbx/export_fbx.py
index d38ff1b93a7e4f1f288d0be348943f0207eaed7e..e3cc0e37c5f1f3b14b7fa98d4b6b97fc1e81720c 100644
--- a/io_scene_fbx/export_fbx.py
+++ b/io_scene_fbx/export_fbx.py
@@ -198,7 +198,7 @@ def save_single(operator, scene, filepath="",
         mesh_smooth_type='FACE',
         use_anim=True,
         use_anim_optimize=True,
-        anim_optimize_precission=6,
+        anim_optimize_precision=6,
         use_anim_action_all=False,
         use_metadata=True,
         path_mode='AUTO',
@@ -2479,7 +2479,7 @@ Connections:  {''')
         frame_orig = scene.frame_current
 
         if use_anim_optimize:
-            ANIM_OPTIMIZE_PRECISSION_FLOAT = 0.1 ** anim_optimize_precission
+            ANIM_OPTIMIZE_PRECISSION_FLOAT = 0.1 ** anim_optimize_precision
 
         # default action, when no actions are avaioable
         tmp_actions = []