diff --git a/igneous_cli/cli.py b/igneous_cli/cli.py
index 5a17e87f..70174bbf 100644
--- a/igneous_cli/cli.py
+++ b/igneous_cli/cli.py
@@ -278,7 +278,7 @@ def downsample(
   """
   factor = (2,2,1)
   if volumetric:
-  	factor = (2,2,2)
+    factor = (2,2,2)
 
   if compress and compress.lower() in ("none", "false"):
     compress = False
@@ -379,7 +379,7 @@ def xfer(
   """
   factor = (2,2,1)
   if volumetric:
-  	factor = (2,2,2)
+    factor = (2,2,2)
 
   if compress and compress.lower() in ("none", "false"):
     compress = False
@@ -1874,7 +1874,7 @@ def create(
 ):
   """Create a Precomputed volume from another data source.
 
-  Supports: .npy, .h5/.hdf5, .nii, .nrrd, and .ckl files
+  Supports: .npy, .h5/.hdf5, .nii/.nii.gz, .nrrd, and .ckl files
   
   Hopefully will support others such as TIFF in the future.
   """
@@ -1934,6 +1934,8 @@ def normalize_file_ext(filename):
     filename, ext2 = os.path.splitext(filename)
     if ext2 in ('.ckl', '.cpso'):
       return ext2
+    elif ext2 == '.nii':
+      return ext2
     elif ext2 == '':
       return ext
     ext = ext2
@@ -2053,4 +2055,4 @@ def purge(queuepath):
   """Delete all queued messages and zero out queue statistics."""
   queuepath = normalize_path(queuepath)
   tq = TaskQueue(queuepath)
-  tq.purge()
\ No newline at end of file
+  tq.purge()