diff --git a/macros.rubygems b/macros.rubygems
index 532ea6c..2552780 100644
--- a/macros.rubygems
+++ b/macros.rubygems
@@ -60,7 +60,7 @@ gem install \\\
 #
 %gemspec_add_dep(g:s:d) \
 read -d '' gemspec_add_dep_script << 'EOR' || : \
-  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}.gemspec}' \
+  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}%{?prerelease}.gemspec}' \
   \
   name = '%{-g*}' \
   requirements = %{*}%{!?1:nil} \
@@ -97,7 +97,7 @@ unset -v gemspec_add_dep_script \
 #
 %gemspec_remove_dep(g:s:d) \
 read -d '' gemspec_remove_dep_script << 'EOR' || : \
-  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}.gemspec}' \
+  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}%{?prerelease}.gemspec}' \
   \
   name = '%{-g*}' \
   requirements = %{*}%{!?1:nil} \
@@ -144,7 +144,7 @@ unset -v gemspec_remove_dep_script \
 #
 %gemspec_add_file(s:tr) \
 read -d '' gemspec_add_file_script << 'EOR' || : \
-  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}.gemspec}' \
+  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}%{?prerelease}.gemspec}' \
   \
   abort("gemspec_add_file: Use only one '-t' or '-r' at a time.") if "%{?-t}%{?-r}" == "-t-r" \
   \
@@ -177,7 +177,7 @@ unset -v gemspec_add_file_script \
 #
 %gemspec_remove_file(s:tr) \
 read -d '' gemspec_remove_file_script << 'EOR' || : \
-  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}.gemspec}' \
+  gemspec_file = '%{-s*}%{!?-s:%{_builddir}/%{gem_name}-%{version}%{?prerelease}.gemspec}' \
   \
   abort("gemspec_remove_file: Use only one '-t' or '-r' at a time.") if "%{?-t}%{?-r}" == "-t-r" \
   \
diff --git a/ruby.spec b/ruby.spec
index e5df88d..2e94ada 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -21,7 +21,7 @@
 %endif
 
 
-%global release 120
+%global release 121
 %{!?release_string:%global release_string %{?development_release:0.}%{release}%{?development_release:.%{development_release}}%{?dist}}
 
 # The RubyGems library has to stay out of Ruby directory tree, since the
@@ -1182,6 +1182,9 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %{_mandir}/man5/gemfile.5*
 
 %changelog
+* Tue Jun 25 2019 Vít Ondruch <vondruch@redhat.com> - 2.6.3-121
+- Properly support %%prerelease in %%gemspec_ macros.
+
 * Thu Apr 25 2019 Pavel Valena <pvalena@redhat.com> - 2.6.3-120
 - Update to Ruby 2.6.3.