diff --git a/modules/openapi-generator/src/main/resources/ruby-client/api_error.mustache b/modules/openapi-generator/src/main/resources/ruby-client/api_error.mustache
index 6d1967b7ba4b..304d55db4bfd 100644
--- a/modules/openapi-generator/src/main/resources/ruby-client/api_error.mustache
+++ b/modules/openapi-generator/src/main/resources/ruby-client/api_error.mustache
@@ -24,6 +24,7 @@ module {{moduleName}}
         end
       else
         super arg
+        @message = arg
       end
     end
 
diff --git a/samples/client/petstore/ruby-autoload/lib/petstore/api_error.rb b/samples/client/petstore/ruby-autoload/lib/petstore/api_error.rb
index 08048f68e367..9ea6651dff81 100644
--- a/samples/client/petstore/ruby-autoload/lib/petstore/api_error.rb
+++ b/samples/client/petstore/ruby-autoload/lib/petstore/api_error.rb
@@ -32,6 +32,7 @@ def initialize(arg = nil)
         end
       else
         super arg
+        @message = arg
       end
     end
 
diff --git a/samples/client/petstore/ruby-faraday/lib/petstore/api_error.rb b/samples/client/petstore/ruby-faraday/lib/petstore/api_error.rb
index 08048f68e367..9ea6651dff81 100644
--- a/samples/client/petstore/ruby-faraday/lib/petstore/api_error.rb
+++ b/samples/client/petstore/ruby-faraday/lib/petstore/api_error.rb
@@ -32,6 +32,7 @@ def initialize(arg = nil)
         end
       else
         super arg
+        @message = arg
       end
     end
 
diff --git a/samples/client/petstore/ruby/lib/petstore/api_error.rb b/samples/client/petstore/ruby/lib/petstore/api_error.rb
index 08048f68e367..9ea6651dff81 100644
--- a/samples/client/petstore/ruby/lib/petstore/api_error.rb
+++ b/samples/client/petstore/ruby/lib/petstore/api_error.rb
@@ -32,6 +32,7 @@ def initialize(arg = nil)
         end
       else
         super arg
+        @message = arg
       end
     end
 
diff --git a/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_error.rb b/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_error.rb
index 7bedb990d019..22ba8538d014 100644
--- a/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_error.rb
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_error.rb
@@ -32,6 +32,7 @@ def initialize(arg = nil)
         end
       else
         super arg
+        @message = arg
       end
     end
 
diff --git a/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_error.rb b/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_error.rb
index 28dbdeeb09b6..d7e0d30b70b5 100644
--- a/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_error.rb
+++ b/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_error.rb
@@ -32,6 +32,7 @@ def initialize(arg = nil)
         end
       else
         super arg
+        @message = arg
       end
     end
 
diff --git a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_error.rb b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_error.rb
index 2d9b7b1229e6..7716ddd44eaa 100644
--- a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_error.rb
+++ b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_error.rb
@@ -32,6 +32,7 @@ def initialize(arg = nil)
         end
       else
         super arg
+        @message = arg
       end
     end