diff --git a/CHANGES.rst b/CHANGES.rst
index c4e1865fb..0ca9347a8 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -19,6 +19,7 @@ Documentation
 JWST
 ----
 - Added Filter and Subarray to miri_pars-jumpstep.rmap [#1010]
+- Added BAND to miri_gain and DETECTOR to miri_pars-detector1pipeline spec files. [#1011]
 
 
 11.17.7 (2023-10-20)
diff --git a/crds/jwst/specs/combined_specs.json b/crds/jwst/specs/combined_specs.json
index 26b57f8cf..66af9d7be 100644
--- a/crds/jwst/specs/combined_specs.json
+++ b/crds/jwst/specs/combined_specs.json
@@ -1196,34 +1196,6 @@
             "tpn":"miri_fringefreq.tpn",
             "unique_rowkeys":null
         },
-        "gain":{
-            "derived_from":"cloning tool 0.05b (2013-04-12) used on 2013-10-04",
-            "extra_keys":null,
-            "file_ext":".fits",
-            "filekind":"GAIN",
-            "filetype":"GAIN",
-            "instrument":"MIRI",
-            "ld_tpn":"miri_gain_ld.tpn",
-            "mapping":"REFERENCE",
-            "name":"miri_gain.rmap",
-            "observatory":"JWST",
-            "parkey":[
-                [
-                    "META.INSTRUMENT.DETECTOR",
-                    "META.INSTRUMENT.FILTER",
-                    "META.SUBARRAY.NAME"
-                ],
-                [
-                    "META.OBSERVATION.DATE",
-                    "META.OBSERVATION.TIME"
-                ]
-            ],
-            "sha1sum":"898a158c3b13c23aa4cb6b2ac6ab12178b5834b1",
-            "suffix":"gain",
-            "text_descr":"Gain",
-            "tpn":"miri_gain.tpn",
-            "unique_rowkeys":null
-        },
         "ipc":{
             "derived_from":"generated as stub rmap on 2014-03-24 15:03:30.015471",
             "extra_keys":null,
@@ -1795,6 +1767,7 @@
             "observatory":"JWST",
             "parkey":[
                 [
+                    "META.INSTRUMENT.DETECTOR",
                     "META.VISIT.TSOVISIT"
                 ],
                 [
@@ -1802,7 +1775,7 @@
                     "META.OBSERVATION.TIME"
                 ]
             ],
-            "sha1sum":"45db150be0397c7711214562e1f5f07a84f1bac5",
+            "sha1sum":"96d195da9de4d8b4112c6031104a5b4c36fb20cb",
             "suffix":"pars-detector1pipeline",
             "text_descr":"Step parameters for Detector1Pipeline",
             "tpn":"miri_pars-detector1pipeline.tpn",
diff --git a/crds/jwst/specs/miri_gain.rmap b/crds/jwst/specs/miri_gain.rmap
index 0aef370cb..ad80a28d0 100644
--- a/crds/jwst/specs/miri_gain.rmap
+++ b/crds/jwst/specs/miri_gain.rmap
@@ -7,8 +7,8 @@ header = {
     'mapping' : 'REFERENCE',
     'name' : 'miri_gain.rmap',
     'observatory' : 'JWST',
-    'parkey' : (('META.INSTRUMENT.DETECTOR', 'META.INSTRUMENT.FILTER', 'META.SUBARRAY.NAME'), ('META.OBSERVATION.DATE', 'META.OBSERVATION.TIME')),
-    'sha1sum' : '898a158c3b13c23aa4cb6b2ac6ab12178b5834b1',
+    'parkey' : (('META.INSTRUMENT.DETECTOR', 'META.INSTRUMENT.FILTER', 'META.INSTRUMENT.BAND', 'META.SUBARRAY.NAME'), ('META.OBSERVATION.DATE', 'META.OBSERVATION.TIME')),
+    'sha1sum' : '39dfd6a132931f669d99443d334555677ff0c011',
     'suffix' : 'gain',
     'text_descr' : 'Gain',
 }
diff --git a/crds/jwst/specs/miri_pars-detector1pipeline.rmap b/crds/jwst/specs/miri_pars-detector1pipeline.rmap
index 3291fab64..0c1f9b0d2 100644
--- a/crds/jwst/specs/miri_pars-detector1pipeline.rmap
+++ b/crds/jwst/specs/miri_pars-detector1pipeline.rmap
@@ -8,8 +8,8 @@ header = {
     'mapping' : 'REFERENCE',
     'name' : '',
     'observatory' : 'JWST',
-    'parkey' : (('META.VISIT.TSOVISIT',), ('META.OBSERVATION.DATE', 'META.OBSERVATION.TIME')),
-    'sha1sum' : '45db150be0397c7711214562e1f5f07a84f1bac5',
+    'parkey' : (('META.INSTRUMENT.DETECTOR', 'META.VISIT.TSOVISIT'), ('META.OBSERVATION.DATE', 'META.OBSERVATION.TIME')),
+    'sha1sum' : '96d195da9de4d8b4112c6031104a5b4c36fb20cb',
     'suffix' : 'pars-detector1pipeline',
     'text_descr' : 'Step parameters for Detector1Pipeline',
 }