diff --git a/simulations/convert_fits_to_casa.py b/simulations/convert_fits_to_casa.py
index ca8db09..c0a8180 100644
--- a/simulations/convert_fits_to_casa.py
+++ b/simulations/convert_fits_to_casa.py
@@ -7,5 +7,5 @@
 
 ms = sys.argv[1]
 
-importfits(fitsimage='%s_image-beam-I.fits'%ms,imagename="%s.pb"%ms)
-importfits(fitsimage='%s_image-image-pb.fits'%ms,imagename='%s_pb.image'%ms)
\ No newline at end of file
+importfits(fitsimage='%s_IM-beam-I.fits'%ms,imagename="%s.pb"%ms)
+importfits(fitsimage='%s_IM-image-pb.fits'%ms,imagename='%s_pb.image'%ms)
\ No newline at end of file