diff --git a/pyuvdata/uvdata/mir.py b/pyuvdata/uvdata/mir.py
index 16f173678..ba50879e2 100644
--- a/pyuvdata/uvdata/mir.py
+++ b/pyuvdata/uvdata/mir.py
@@ -98,6 +98,7 @@ def read_mir(
         rechunk=None,
         compass_soln=None,
         swarm_only=True,
+        codes_check=True,
         run_check=True,
         check_extra=True,
         run_check_acceptability=True,
@@ -110,9 +111,14 @@ def read_mir(
         # Use the mir_parser to read in metadata, which can be used to select data.
         # We want to sure that the mir file is v3 compliant, since correctly filling
         # values into a UVData object depends on that.
-        mir_data = mir_parser.MirParser(
-            filepath=filepath, compass_soln=compass_soln, make_v3_compliant=True
-        )
+        mir_data = mir_parser.MirParser(filepath=filepath, compass_soln=compass_soln)
+
+        if codes_check:
+            where_list = []
+            for code in mir_data.codes_data._mutable_codes:
+                if code in mir_data.codes_data.get_code_names():
+                    where_list.append((code, "eq", list(mir_data.codes_data[code])))
+            mir_data.select(where=where_list)
 
         if select_where is None:
             select_where = []
diff --git a/pyuvdata/uvdata/mir_parser.py b/pyuvdata/uvdata/mir_parser.py
index 24be33cd9..2e52bdfcd 100644
--- a/pyuvdata/uvdata/mir_parser.py
+++ b/pyuvdata/uvdata/mir_parser.py
@@ -581,7 +581,7 @@ def _fix_int_dict(self, data_type=None):
 
             # Go through the individual entries in each dict, and update them
             # with the "correct" values as determined by scanning through sch_read
-            for key in new_dict:
+            for key in inhid_map:
                 int_dict[inhid_map[key]] = new_dict[key]
 
     @staticmethod