diff --git a/modules/openapi-generator/src/main/resources/scala-akka-client/apiInvoker.mustache b/modules/openapi-generator/src/main/resources/scala-akka-client/apiInvoker.mustache
index a82135170c4..f9dd5c19b87 100644
--- a/modules/openapi-generator/src/main/resources/scala-akka-client/apiInvoker.mustache
+++ b/modules/openapi-generator/src/main/resources/scala-akka-client/apiInvoker.mustache
@@ -172,7 +172,7 @@ class ApiInvoker(formats: Formats)(implicit system: ActorSystem) extends CustomC
           case Some(c: String) =>
             HttpRequest(m, uri, entity = HttpEntity(normalizedContentType(request.contentType), ByteString(c)))
           case _ =>
-            HttpRequest(m, uri, entity = HttpEntity(normalizedContentType(request.contentType), ByteString(" ")))
+            HttpRequest(m, uri, entity = HttpEntity(normalizedContentType(request.contentType), ByteString("")))
         }
       case m: HttpMethod => HttpRequest(m, uri)
     }
diff --git a/samples/client/petstore/scala-akka/src/main/scala/org/openapitools/client/core/ApiInvoker.scala b/samples/client/petstore/scala-akka/src/main/scala/org/openapitools/client/core/ApiInvoker.scala
index fe391096713..74575e12cdd 100644
--- a/samples/client/petstore/scala-akka/src/main/scala/org/openapitools/client/core/ApiInvoker.scala
+++ b/samples/client/petstore/scala-akka/src/main/scala/org/openapitools/client/core/ApiInvoker.scala
@@ -182,7 +182,7 @@ class ApiInvoker(formats: Formats)(implicit system: ActorSystem) extends CustomC
           case Some(c: String) =>
             HttpRequest(m, uri, entity = HttpEntity(normalizedContentType(request.contentType), ByteString(c)))
           case _ =>
-            HttpRequest(m, uri, entity = HttpEntity(normalizedContentType(request.contentType), ByteString(" ")))
+            HttpRequest(m, uri, entity = HttpEntity(normalizedContentType(request.contentType), ByteString("")))
         }
       case m: HttpMethod => HttpRequest(m, uri)
     }