diff --git a/lib/drizzlepac/tweakback.py b/lib/drizzlepac/tweakback.py
index <HASH>..<HASH> 100644
--- a/lib/drizzlepac/tweakback.py
+++ b/lib/drizzlepac/tweakback.py
@@ -194,8 +194,8 @@ def tweakback(drzfile, input=None,  origwcs = None,
         crderr2 = 0.0
     del scihdr
     ### Step 2: Generate footprints for each WCS
-    final_fp = final_wcs.calcFootprint()
-    orig_fp = orig_wcs.calcFootprint()
+    final_fp = final_wcs.calc_footprint()
+    orig_fp = orig_wcs.calc_footprint()
 
     ### Step 3: Create pixel positions in final WCS for each footprint
     final_xy_fp = final_wcs.wcs_world2pix(final_fp, 1)
Update to tweakback to get it to work with the updated interface to calc_footprint in stwcs.


git-svn-id: <URL>