diff --git a/nipype/interfaces/ants/registration.py b/nipype/interfaces/ants/registration.py
index 91a6d2a557..71d1e5457f 100644
--- a/nipype/interfaces/ants/registration.py
+++ b/nipype/interfaces/ants/registration.py
@@ -19,8 +19,7 @@ class ANTSInputSpec(ANTSCommandInputSpec):
     dimension = traits.Enum(3, 2, argstr='%d', usedefault=False,
                             position=1, desc='image dimension (2 or 3)')
     fixed_image = InputMultiPath(File(exists=True), mandatory=True,
-                                 desc=('image to apply transformation to (generally a coregistered '
-                                       'functional)'))
+                                 desc=('image to which the moving image is warped'))
     moving_image = InputMultiPath(File(exists=True), argstr='%s',
                                   mandatory=True,
                                   desc=('image to apply transformation to (generally a coregistered '