diff --git a/csst/msc/calib_pos.py b/csst/msc/calib_pos.py
index 94b574a3b89ebdc4f69233b7e51e9d4d0930f099..f9014a6b42fd656fb4ac4067dc6f4396c46bafb8 100644
--- a/csst/msc/calib_pos.py
+++ b/csst/msc/calib_pos.py
@@ -170,7 +170,7 @@ class CsstProcMscPositionCalibration(CsstProcessor):
         tbl2.header['EXTNAME'] = 'LDAC_OBJECTS'
         return tbl1, tbl2
 
-    def get_refcat(self, img_list, path_gaia, search_radius, silent=True,pm_correct=True):
+    def get_refcat(self, img_list, path_gaia, search_radius, silent=True, pm_correct=True):
         """
         Get reference catalog for scamp. The reference cat is GAIA EDR3.
 
@@ -190,7 +190,7 @@ class CsstProcMscPositionCalibration(CsstProcessor):
             filename of the cross matched catalog: ref.cat
         """
         outcat = self.dm.pc_ref_cat
-        fnmae = self.dm.pc_combined_file("img","fits")
+        fname = self.dm.pc_combined_file("img","fits")
         hdu = fits.open(fname)
         header1 = hdu[0].header
         header2 = hdu[1].header