diff --git a/modules/swagger-codegen/src/main/resources/cpprest/apiclient-header.mustache b/modules/swagger-codegen/src/main/resources/cpprest/apiclient-header.mustache
index 3ab4f8eced2..23bc7633171 100644
--- a/modules/swagger-codegen/src/main/resources/cpprest/apiclient-header.mustache
+++ b/modules/swagger-codegen/src/main/resources/cpprest/apiclient-header.mustache
@@ -39,6 +39,7 @@ public:
     static utility::string_t parameterToString(int32_t value);
     static utility::string_t parameterToString(int64_t value);
     static utility::string_t parameterToString(float value);
+    static utility::string_t parameterToString(double value);
     static utility::string_t parameterToString(const utility::datetime &value);
     template<class T>
     static utility::string_t parameterToString(const std::vector<T>& value);
diff --git a/modules/swagger-codegen/src/main/resources/cpprest/apiclient-source.mustache b/modules/swagger-codegen/src/main/resources/cpprest/apiclient-source.mustache
index fae8c4c70b3..e5a1500c8d5 100644
--- a/modules/swagger-codegen/src/main/resources/cpprest/apiclient-source.mustache
+++ b/modules/swagger-codegen/src/main/resources/cpprest/apiclient-source.mustache
@@ -49,6 +49,11 @@ utility::string_t ApiClient::parameterToString(float value)
     return utility::conversions::to_string_t(std::to_string(value));
 }
 
+utility::string_t ApiClient::parameterToString(double value)
+{
+    return utility::conversions::to_string_t(std::to_string(value));
+}
+
 utility::string_t ApiClient::parameterToString(const utility::datetime &value)
 {
     return utility::conversions::to_string_t(value.to_string(utility::datetime::ISO_8601));
diff --git a/samples/client/petstore/cpprest/ApiClient.cpp b/samples/client/petstore/cpprest/ApiClient.cpp
index 346479cc1b8..5de6a5dee77 100644
--- a/samples/client/petstore/cpprest/ApiClient.cpp
+++ b/samples/client/petstore/cpprest/ApiClient.cpp
@@ -61,6 +61,11 @@ utility::string_t ApiClient::parameterToString(float value)
     return utility::conversions::to_string_t(std::to_string(value));
 }
 
+utility::string_t ApiClient::parameterToString(double value)
+{
+    return utility::conversions::to_string_t(std::to_string(value));
+}
+
 utility::string_t ApiClient::parameterToString(const utility::datetime &value)
 {
     return utility::conversions::to_string_t(value.to_string(utility::datetime::ISO_8601));
diff --git a/samples/client/petstore/cpprest/ApiClient.h b/samples/client/petstore/cpprest/ApiClient.h
index 1dba60fc591..b4eaadbcf02 100644
--- a/samples/client/petstore/cpprest/ApiClient.h
+++ b/samples/client/petstore/cpprest/ApiClient.h
@@ -51,6 +51,7 @@ public:
     static utility::string_t parameterToString(int32_t value);
     static utility::string_t parameterToString(int64_t value);
     static utility::string_t parameterToString(float value);
+    static utility::string_t parameterToString(double value);
     static utility::string_t parameterToString(const utility::datetime &value);
     template<class T>
     static utility::string_t parameterToString(const std::vector<T>& value);