diff --git a/src/ruby/tools/bin/grpc_tools_ruby_protoc b/src/ruby/tools/bin/grpc_tools_ruby_protoc
index dab06e7958d..7e619e74a96 100755
--- a/src/ruby/tools/bin/grpc_tools_ruby_protoc
+++ b/src/ruby/tools/bin/grpc_tools_ruby_protoc
@@ -30,7 +30,7 @@
 
 require 'rbconfig'
 
-require_relative '../os_check'
+require_relative '../platform_check'
 
 ext = RbConfig::CONFIG['EXEEXT']
 
@@ -39,7 +39,7 @@ protoc_name = 'protoc' + ext
 plugin_name = 'grpc_ruby_plugin' + ext
 
 protoc_dir = File.join(File.dirname(__FILE__),
-                       RbConfig::CONFIG['host_cpu'] + '-' + OS.os_name)
+                       PLATFORM.architecture + '-' + PLATFORM.os_name)
 
 protoc_path = File.join(protoc_dir, protoc_name)
 
diff --git a/src/ruby/tools/bin/grpc_tools_ruby_protoc_plugin b/src/ruby/tools/bin/grpc_tools_ruby_protoc_plugin
index 4b296dedc75..e6af2fe3651 100755
--- a/src/ruby/tools/bin/grpc_tools_ruby_protoc_plugin
+++ b/src/ruby/tools/bin/grpc_tools_ruby_protoc_plugin
@@ -30,12 +30,12 @@
 
 require 'rbconfig'
 
-require_relative '../os_check'
+require_relative '../platform_check'
 
 plugin_name = 'grpc_ruby_plugin' + RbConfig::CONFIG['EXEEXT']
 
 plugin_path = File.join(File.dirname(__FILE__),
-                        RbConfig::CONFIG['host_cpu'] + '-' + OS.os_name,
+                        PLATFORM.architecture + '-' + PLATFORM.os_name,
                         plugin_name)
 
 exec([ plugin_path, plugin_path ], *ARGV)
diff --git a/src/ruby/tools/grpc-tools.gemspec b/src/ruby/tools/grpc-tools.gemspec
index 68e2a7a1133..bc142ae3cb5 100644
--- a/src/ruby/tools/grpc-tools.gemspec
+++ b/src/ruby/tools/grpc-tools.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |s|
   s.description = 'protoc and the Ruby gRPC protoc plugin'
   s.license = 'BSD-3-Clause'
 
-  s.files = %w( version.rb os_check.rb README.md )
+  s.files = %w( version.rb platform_check.rb README.md )
   s.files += Dir.glob('bin/**/*')
 
   s.bindir = 'bin'
diff --git a/src/ruby/tools/os_check.rb b/src/ruby/tools/platform_check.rb
similarity index 84%
rename from src/ruby/tools/os_check.rb
rename to src/ruby/tools/platform_check.rb
index 2677306457b..1f4d5a68b71 100644
--- a/src/ruby/tools/os_check.rb
+++ b/src/ruby/tools/platform_check.rb
@@ -27,19 +27,28 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-# This is based on http://stackoverflow.com/a/171011/159388 by Aaron Hinni
-
 require 'rbconfig'
 
-module OS
-  def OS.os_name
+# This is based on http://stackoverflow.com/a/171011/159388 by Aaron Hinni
+
+module PLATFORM
+  def PLATFORM.os_name
     case RbConfig::CONFIG['host_os']
-    when /cygwin|mswin|mingw|bccwin|wince|emx/
-      'windows'
-    when /darwin/
-      'macos'
-    else
-      'linux'
+      when /cygwin|mswin|mingw|bccwin|wince|emx/
+        'windows'
+      when /darwin/
+        'macos'
+      else
+        'linux'
+    end
+  end
+
+  def PLATFORM.architecture
+    case RbConfig::CONFIG['host_cpu']
+      when /x86_64/
+        'x86_64'
+      else
+        'x86'
     end
   end
 end