diff --git a/lib/spack/spack/cmd/mirror.py b/lib/spack/spack/cmd/mirror.py
index e97a4ddefa7..b641f0b052d 100644
--- a/lib/spack/spack/cmd/mirror.py
+++ b/lib/spack/spack/cmd/mirror.py
@@ -134,6 +134,15 @@ def setup_parser(subparser):
         default=None,
         dest="signed",
     )
+    add_parser.add_argument(
+        "--include-file",
+        help="specs which Spack should always try to add to a mirror"
+        " (listed in a file, one per line)",
+    )
+    add_parser.add_argument(
+        "--include-specs",
+        help="specs which Spack should always try to add to a mirror (specified on command line)",
+    )
     add_parser.add_argument(
         "--exclude-file",
         help="specs which Spack should not try to add to a mirror"
@@ -378,6 +387,15 @@ def mirror_add(args):
     else:
         mirror = spack.mirrors.mirror.Mirror(args.url, name=args.name)
 
+    include_specs = []
+    if args.include_file:
+        include_specs.extend(specs_from_text_file(args.include_file, concretize=False))
+    if args.include_specs:
+        include_specs.extend(spack.cmd.parse_specs(str(args.include_specs).split()))
+    if include_specs:
+        # round trip specs to assure they are valid
+        mirror.update({"include": [str(s) for s in include_specs]})
+
     exclude_specs = []
     if args.exclude_file:
         exclude_specs.extend(specs_from_text_file(args.exclude_file, concretize=False))
diff --git a/share/spack/spack-completion.bash b/share/spack/spack-completion.bash
index e6dd1634086..fee89c84a64 100644
--- a/share/spack/spack-completion.bash
+++ b/share/spack/spack-completion.bash
@@ -1459,7 +1459,7 @@ _spack_mirror_destroy() {
 _spack_mirror_add() {
     if $list_options
     then
-        SPACK_COMPREPLY="-h --help --scope --type --autopush --unsigned --signed --exclude-file --exclude-specs --s3-access-key-id --s3-access-key-id-variable --s3-access-key-secret --s3-access-key-secret-variable --s3-access-token --s3-access-token-variable --s3-profile --s3-endpoint-url --oci-username --oci-username-variable --oci-password --oci-password-variable"
+        SPACK_COMPREPLY="-h --help --scope --type --autopush --unsigned --signed --include-file --include-specs --exclude-file --exclude-specs --s3-access-key-id --s3-access-key-id-variable --s3-access-key-secret --s3-access-key-secret-variable --s3-access-token --s3-access-token-variable --s3-profile --s3-endpoint-url --oci-username --oci-username-variable --oci-password --oci-password-variable"
     else
         _mirrors
     fi
diff --git a/share/spack/spack-completion.fish b/share/spack/spack-completion.fish
index c2588139bd0..210170f3a2b 100644
--- a/share/spack/spack-completion.fish
+++ b/share/spack/spack-completion.fish
@@ -2301,7 +2301,7 @@ complete -c spack -n '__fish_spack_using_command mirror destroy' -l mirror-url -
 complete -c spack -n '__fish_spack_using_command mirror destroy' -l mirror-url -r -d 'find mirror to destroy by url'
 
 # spack mirror add
-set -g __fish_spack_optspecs_spack_mirror_add h/help scope= type= autopush unsigned signed exclude-file= exclude-specs= s3-access-key-id= s3-access-key-id-variable= s3-access-key-secret= s3-access-key-secret-variable= s3-access-token= s3-access-token-variable= s3-profile= s3-endpoint-url= oci-username= oci-username-variable= oci-password= oci-password-variable=
+set -g __fish_spack_optspecs_spack_mirror_add h/help scope= type= autopush unsigned signed include-file= include-specs= exclude-file= exclude-specs= s3-access-key-id= s3-access-key-id-variable= s3-access-key-secret= s3-access-key-secret-variable= s3-access-token= s3-access-token-variable= s3-profile= s3-endpoint-url= oci-username= oci-username-variable= oci-password= oci-password-variable=
 complete -c spack -n '__fish_spack_using_command_pos 0 mirror add' -f
 complete -c spack -n '__fish_spack_using_command mirror add' -s h -l help -f -a help
 complete -c spack -n '__fish_spack_using_command mirror add' -s h -l help -d 'show this help message and exit'
@@ -2315,6 +2315,10 @@ complete -c spack -n '__fish_spack_using_command mirror add' -l unsigned -f -a s
 complete -c spack -n '__fish_spack_using_command mirror add' -l unsigned -d 'do not require signing and signature verification when pushing and installing from this build cache'
 complete -c spack -n '__fish_spack_using_command mirror add' -l signed -f -a signed
 complete -c spack -n '__fish_spack_using_command mirror add' -l signed -d 'require signing and signature verification when pushing and installing from this build cache'
+complete -c spack -n '__fish_spack_using_command mirror add' -l include-file -r -f -a include_file
+complete -c spack -n '__fish_spack_using_command mirror add' -l include-file -r -d 'specs which Spack should always try to add to a mirror (listed in a file, one per line)'
+complete -c spack -n '__fish_spack_using_command mirror add' -l include-specs -r -f -a include_specs
+complete -c spack -n '__fish_spack_using_command mirror add' -l include-specs -r -d 'specs which Spack should always try to add to a mirror (specified on command line)'
 complete -c spack -n '__fish_spack_using_command mirror add' -l exclude-file -r -f -a exclude_file
 complete -c spack -n '__fish_spack_using_command mirror add' -l exclude-file -r -d 'specs which Spack should not try to add to a mirror (listed in a file, one per line)'
 complete -c spack -n '__fish_spack_using_command mirror add' -l exclude-specs -r -f -a exclude_specs