diff --git a/ruby.spec b/ruby.spec
index c86034c..70598d2 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -1073,6 +1073,9 @@ make check TESTS="-v $DISABLE_TESTS"
 %{gem_dir}/specifications/xmlrpc-%{xmlrpc_version}.gemspec
 
 %changelog
+* Tue Apr 10 2018 Vít Ondruch <vondruch@redhat.com> - 2.5.1-92
+- Conflict requirement needs to generate dependency.
+
 * Thu Mar 29 2018 Pavel Valena <pvalena@redhat.com> - 2.5.1-92
 - Update to Ruby 2.5.1.
 
diff --git a/rubygems.req b/rubygems.req
index 6868bdd..d75247d 100644
--- a/rubygems.req
+++ b/rubygems.req
@@ -11,7 +11,13 @@ module RubyGemsReq
         when '~>'
           expand_pessimistic_requirement(r)
         when '!='
-          []
+          # If there is only the conflict requirement, we still need to depend
+          # on the specified gem.
+          if requirements.size == 1
+            Gem::Requirement.default.requirements
+          else
+            []
+          end
         else
           [r]
         end