diff --git a/macros.rubygems b/macros.rubygems
index b4dfc92..d2e8514 100644
--- a/macros.rubygems
+++ b/macros.rubygems
@@ -42,8 +42,8 @@ gem install \\\
 }
 
 
-# The 'read' command in gemspec_add_dep and gemspec_remove_dep macros is not
-# essential, but it is usefull to make the script appear in build log.
+# The 'read' command in %%gemspec_* macros is not essential, but it is usefull
+# to make the sript appear in build log.
 
 
 # %gemspec_add_dep - Add dependency into .gemspec.
@@ -128,3 +128,68 @@ EOR\
 echo "$gemspec_remove_dep_script" | ruby \
 unset -v gemspec_remove_dep_script \
 %{nil}
+
+
+# %%gemspec_add_file - Add files to various files lists in .gemspec.
+#
+# Usage: %%gemspec_add_file [options] <file>
+#
+# Add files to .gemspec file. <file> is expected to be valid Ruby code.
+# Path to file is expected. Does not check real files in any way.
+# By default, `files` list is edited.
+#
+# -s <gemspec_file>   Overrides the default .gemspec location.
+# -t                  Edit test_files only.
+# -r                  Edit extra_rdoc_files only.
+#
+%gemspec_add_file(s:tr) \
+read -d '' gemspec_add_file_script << 'EOR' || : \
+  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}.gemspec}' \
+  \
+  abort("gemspec_add_file: Use only one '-t' or '-r' at a time.") if "%{?-t}%{?-r}" == "-t-r" \
+  \
+  filenames = %{*}%{!?1:nil} \
+  filenames = Array(filenames) \
+  \
+  spec = Gem::Specification.load(gemspec_file) \
+  abort("#{gemspec_file} is not accessible.") unless spec \
+  \
+  spec.%{?-t:test_}%{?-r:extra_rdoc_}files += filenames \
+  File.write gemspec_file, spec.to_ruby \
+EOR\
+echo "$gemspec_add_file_script" | ruby \
+unset -v gemspec_add_file_script \
+%{nil}
+
+
+# %%gemspec_remove_file - Remove files from various files lists in .gemspec.
+#
+# Usage: %%gemspec_remove_file [options] <file>
+#
+# Remove files from .gemspec file. <file> is expected to be valid Ruby code.
+# Path to file is expected. Does not check/remove real files in any way.
+# By default, `files` list is edited. File has to be removed from `test_files`
+# first in order to be removable from `files`.
+#
+# -s <gemspec_file>   Overrides the default .gemspec location.
+# -t                  Edit test_files only.
+# -r                  Edit extra_rdoc_files only.
+#
+%gemspec_remove_file(s:tr) \
+read -d '' gemspec_remove_file_script << 'EOR' || : \
+  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}.gemspec}' \
+  \
+  abort("gemspec_remove_file: Use only one '-t' or '-r' at a time.") if "%{?-t}%{?-r}" == "-t-r" \
+  \
+  filenames = %{*}%{!?1:nil} \
+  filenames = Array(filenames) \
+  \
+  spec = Gem::Specification.load(gemspec_file) \
+  abort("#{gemspec_file} is not accessible.") unless spec \
+  \
+  spec.%{?-t:test_}%{?-r:extra_rdoc_}files -= filenames \
+  File.write gemspec_file, spec.to_ruby \
+EOR\
+echo "$gemspec_remove_file_script" | ruby \
+unset -v gemspec_remove_file_script \
+%{nil}
diff --git a/ruby.spec b/ruby.spec
index bfde4a1..99ef23e 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -1068,6 +1068,10 @@ make check TESTS="-v $DISABLE_TESTS"
 %{gem_dir}/specifications/xmlrpc-%{xmlrpc_version}.gemspec
 
 %changelog
+* Thu May 10 2018 Pavel Valena <pvalena@redhat.com> - 2.5.1-93
+- Add macros to edit files lists in .gemspec
+  (gemspec_add_file and gemspec_remove_file).
+
 * Wed May 02 2018 Vít Ondruch <vondruch@redhat.com> - 2.5.1-93
 - Make %%gemspec_{add,remove}_dep modify .gemspec provided by %%setup macro.