diff --git a/src/NSwag.Core/OpenApiOperation.cs b/src/NSwag.Core/OpenApiOperation.cs
index bf0e2f9ef7..a02a600433 100644
--- a/src/NSwag.Core/OpenApiOperation.cs
+++ b/src/NSwag.Core/OpenApiOperation.cs
@@ -170,7 +170,7 @@ public IReadOnlyList<OpenApiParameter> ActualParameters
 
         /// <summary>Gets the response body and dereferences it if necessary.</summary>
         [JsonIgnore]
-        public OpenApiRequestBody ActualRequestBody => RequestBody.ActualRequestBody;
+        public OpenApiRequestBody ActualRequestBody => RequestBody?.ActualRequestBody;
 
         /// <summary>Gets the responses from the operation and from the <see cref="OpenApiDocument"/> and dereferences them if necessary.</summary>
         [JsonIgnore]