diff --git a/modules/swagger-codegen/src/main/resources/ruby/api.mustache b/modules/swagger-codegen/src/main/resources/ruby/api.mustache
index 488bcbeb16..43481184f5 100644
--- a/modules/swagger-codegen/src/main/resources/ruby/api.mustache
+++ b/modules/swagger-codegen/src/main/resources/ruby/api.mustache
@@ -29,7 +29,7 @@ class {{classname}}
     }.merge(opts)
 
     #resource path
-    path = "{{path}}".sub('{format}','json'){{#pathParams}}.sub('{' + '{{baseName}}' + '}', {{paramName}})
+    path = "{{path}}".sub('{format}','json'){{#pathParams}}.sub('{' + '{{baseName}}' + '}', {{paramName}}.to_s)
     {{/pathParams}}{{newline}}
     
     # pull querystring keys from options
diff --git a/samples/client/petstore/ruby/lib/pet_api.rb b/samples/client/petstore/ruby/lib/pet_api.rb
index c48cf0c2c0..3e91297a99 100644
--- a/samples/client/petstore/ruby/lib/pet_api.rb
+++ b/samples/client/petstore/ruby/lib/pet_api.rb
@@ -225,7 +225,7 @@ class PetApi
     }.merge(opts)
 
     #resource path
-    path = "/pet/{petId}".sub('{format}','json').sub('{' + 'petId' + '}', pet_id)
+    path = "/pet/{petId}".sub('{format}','json').sub('{' + 'petId' + '}', pet_id.to_s)
     
     
     # pull querystring keys from options
@@ -271,7 +271,7 @@ class PetApi
     }.merge(opts)
 
     #resource path
-    path = "/pet/{petId}".sub('{format}','json').sub('{' + 'petId' + '}', pet_id)
+    path = "/pet/{petId}".sub('{format}','json').sub('{' + 'petId' + '}', pet_id.to_s)
     
     
     # pull querystring keys from options
@@ -316,7 +316,7 @@ class PetApi
     }.merge(opts)
 
     #resource path
-    path = "/pet/{petId}".sub('{format}','json').sub('{' + 'petId' + '}', pet_id)
+    path = "/pet/{petId}".sub('{format}','json').sub('{' + 'petId' + '}', pet_id.to_s)
     
     
     # pull querystring keys from options
@@ -361,7 +361,7 @@ class PetApi
     }.merge(opts)
 
     #resource path
-    path = "/pet/{petId}/uploadImage".sub('{format}','json').sub('{' + 'petId' + '}', pet_id)
+    path = "/pet/{petId}/uploadImage".sub('{format}','json').sub('{' + 'petId' + '}', pet_id.to_s)
     
     
     # pull querystring keys from options
diff --git a/samples/client/petstore/ruby/lib/store_api.rb b/samples/client/petstore/ruby/lib/store_api.rb
index 2606213ee0..1b355de8df 100644
--- a/samples/client/petstore/ruby/lib/store_api.rb
+++ b/samples/client/petstore/ruby/lib/store_api.rb
@@ -122,7 +122,7 @@ class StoreApi
     }.merge(opts)
 
     #resource path
-    path = "/store/order/{orderId}".sub('{format}','json').sub('{' + 'orderId' + '}', order_id)
+    path = "/store/order/{orderId}".sub('{format}','json').sub('{' + 'orderId' + '}', order_id.to_s)
     
     
     # pull querystring keys from options
@@ -164,7 +164,7 @@ class StoreApi
     }.merge(opts)
 
     #resource path
-    path = "/store/order/{orderId}".sub('{format}','json').sub('{' + 'orderId' + '}', order_id)
+    path = "/store/order/{orderId}".sub('{format}','json').sub('{' + 'orderId' + '}', order_id.to_s)
     
     
     # pull querystring keys from options
diff --git a/samples/client/petstore/ruby/lib/user_api.rb b/samples/client/petstore/ruby/lib/user_api.rb
index ffa90a4e8f..efb37d6768 100644
--- a/samples/client/petstore/ruby/lib/user_api.rb
+++ b/samples/client/petstore/ruby/lib/user_api.rb
@@ -282,7 +282,7 @@ class UserApi
     }.merge(opts)
 
     #resource path
-    path = "/user/{username}".sub('{format}','json').sub('{' + 'username' + '}', username)
+    path = "/user/{username}".sub('{format}','json').sub('{' + 'username' + '}', username.to_s)
     
     
     # pull querystring keys from options
@@ -326,7 +326,7 @@ class UserApi
     }.merge(opts)
 
     #resource path
-    path = "/user/{username}".sub('{format}','json').sub('{' + 'username' + '}', username)
+    path = "/user/{username}".sub('{format}','json').sub('{' + 'username' + '}', username.to_s)
     
     
     # pull querystring keys from options
@@ -387,7 +387,7 @@ class UserApi
     }.merge(opts)
 
     #resource path
-    path = "/user/{username}".sub('{format}','json').sub('{' + 'username' + '}', username)
+    path = "/user/{username}".sub('{format}','json').sub('{' + 'username' + '}', username.to_s)
     
     
     # pull querystring keys from options
diff --git a/samples/client/petstore/ruby/spec/request_spec.rb b/samples/client/petstore/ruby/spec/request_spec.rb
index 015f04c7db..61389eddc9 100644
--- a/samples/client/petstore/ruby/spec/request_spec.rb
+++ b/samples/client/petstore/ruby/spec/request_spec.rb
@@ -73,20 +73,18 @@ describe Swagger::Request do
   describe "path" do
 
     it "accounts for a total absence of format in the path string" do
-      @request = Swagger::Request.new(:get, "/word.{format}/{word}/entries", @default_params.merge({
+      @request = Swagger::Request.new(:get, "/word.{format}/cat/entries", @default_params.merge({
         :format => "xml",
         :params => {
-          :word => "cat"
         }
       }))
       @request.url.should == "http://petstore.swagger.io/v2/word.xml/cat/entries"
     end
 
-    it "does string substitution on path params" do
-      @request = Swagger::Request.new(:get, "/word.{format}/{word}/entries", @default_params.merge({
+    it "does string substitution (format) on path params" do
+      @request = Swagger::Request.new(:get, "/word.{format}/cat/entries", @default_params.merge({
         :format => "xml",
         :params => {
-          :word => "cat"
         }
       }))
       @request.url.should == "http://petstore.swagger.io/v2/word.xml/cat/entries"
@@ -123,7 +121,7 @@ describe Swagger::Request do
     end
 
     it "URI encodes the path" do
-      @request = Swagger::Request.new(:get, "word.{format}/{word}/definitions", @default_params.merge({
+      @request = Swagger::Request.new(:get, "word.{format}/bill gates/definitions", @default_params.merge({
         :params => {
           :word => "bill gates"
         }
@@ -200,4 +198,4 @@ describe Swagger::Request do
 
   end
 
-end
\ No newline at end of file
+end