diff --git a/bundler/lib/bundler/templates/newgem/newgem.gemspec.tt b/bundler/lib/bundler/templates/newgem/newgem.gemspec.tt
index 7799dbfd32f0..c705f9eac0c7 100644
--- a/bundler/lib/bundler/templates/newgem/newgem.gemspec.tt
+++ b/bundler/lib/bundler/templates/newgem/newgem.gemspec.tt
@@ -40,6 +40,9 @@ Gem::Specification.new do |spec|
 
   # Uncomment to register a new dependency of your gem
   # spec.add_dependency "example-gem", "~> 1.0"
+<%- if config[:ext] == 'rust' -%>
+  spec.add_dependency "rb_sys", "~> 0.9.91"
+<%- end -%>
 <%- if config[:ext] == 'go' -%>
   spec.add_dependency "go_gem", "~> 0.2"
 <%- end -%>
diff --git a/spec/commands/newgem_spec.rb b/spec/commands/newgem_spec.rb
index 15564544e35e..3da7702b4278 100644
--- a/spec/commands/newgem_spec.rb
+++ b/spec/commands/newgem_spec.rb
@@ -1736,8 +1736,9 @@ def create_temporary_dir(dir)
         expect(bundled_app("#{gem_name}/ext/#{gem_name}/build.rs")).to exist
       end
 
-      it "includes rake-compiler constraint" do
+      it "includes rake-compiler and rb_sys gems constraint" do
         expect(bundled_app("#{gem_name}/Gemfile").read).to include('gem "rake-compiler"')
+        expect(bundled_app("#{gem_name}/#{gem_name}.gemspec").read).to include('spec.add_dependency "rb_sys"')
       end
 
       it "depends on compile task for build" do