diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm/infrastructure/ApiClient.kt.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm/infrastructure/ApiClient.kt.mustache
index e57a0addfd4..358128a7b50 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm/infrastructure/ApiClient.kt.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm/infrastructure/ApiClient.kt.mustache
@@ -161,7 +161,7 @@ open class ApiClient(val baseUrl: String) {
         val contentType = (headers[ContentType] as String).substringBefore(";").toLowerCase()
 
         val request = when (requestConfig.method) {
-            RequestMethod.DELETE -> Request.Builder().url(url).delete()
+            RequestMethod.DELETE -> Request.Builder().url(url).delete(requestBody(body, contentType))
             RequestMethod.GET -> Request.Builder().url(url)
             RequestMethod.HEAD -> Request.Builder().url(url).head()
             RequestMethod.PATCH -> Request.Builder().url(url).patch(requestBody(body, contentType))
diff --git a/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index def00253aed..3df0d806a91 100644
--- a/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-string/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -124,7 +124,7 @@ open class ApiClient(val baseUrl: String) {
         val contentType = (headers[ContentType] as String).substringBefore(";").toLowerCase()
 
         val request = when (requestConfig.method) {
-            RequestMethod.DELETE -> Request.Builder().url(url).delete()
+            RequestMethod.DELETE -> Request.Builder().url(url).delete(requestBody(body, contentType))
             RequestMethod.GET -> Request.Builder().url(url)
             RequestMethod.HEAD -> Request.Builder().url(url).head()
             RequestMethod.PATCH -> Request.Builder().url(url).patch(requestBody(body, contentType))
diff --git a/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index def00253aed..3df0d806a91 100644
--- a/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin-threetenbp/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -124,7 +124,7 @@ open class ApiClient(val baseUrl: String) {
         val contentType = (headers[ContentType] as String).substringBefore(";").toLowerCase()
 
         val request = when (requestConfig.method) {
-            RequestMethod.DELETE -> Request.Builder().url(url).delete()
+            RequestMethod.DELETE -> Request.Builder().url(url).delete(requestBody(body, contentType))
             RequestMethod.GET -> Request.Builder().url(url)
             RequestMethod.HEAD -> Request.Builder().url(url).head()
             RequestMethod.PATCH -> Request.Builder().url(url).patch(requestBody(body, contentType))
diff --git a/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt b/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
index def00253aed..3df0d806a91 100644
--- a/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
+++ b/samples/client/petstore/kotlin/src/main/kotlin/org/openapitools/client/infrastructure/ApiClient.kt
@@ -124,7 +124,7 @@ open class ApiClient(val baseUrl: String) {
         val contentType = (headers[ContentType] as String).substringBefore(";").toLowerCase()
 
         val request = when (requestConfig.method) {
-            RequestMethod.DELETE -> Request.Builder().url(url).delete()
+            RequestMethod.DELETE -> Request.Builder().url(url).delete(requestBody(body, contentType))
             RequestMethod.GET -> Request.Builder().url(url)
             RequestMethod.HEAD -> Request.Builder().url(url).head()
             RequestMethod.PATCH -> Request.Builder().url(url).patch(requestBody(body, contentType))