diff -x Makefile -x .deps -x '*.rc' -ur libmicrohttpd-0.9.65/src/include/microhttpd.h libmicrohttpd/src/include/microhttpd.h
--- libmicrohttpd-0.9.65/src/include/microhttpd.h	2019-07-05 16:21:24.000000000 -0400
+++ libmicrohttpd/src/include/microhttpd.h	2019-07-21 22:03:05.388191487 -0400
@@ -2887,11 +2887,24 @@
   /**
    * End of the list of options.
    */
-  MHD_RO_END = 0
+  MHD_RO_END = 0,
+  
+  /**
+   * Set a specific free() function
+   * to free response buffer instead of libc void free(void * ptr)
+   */
+  MHD_RO_FREE_FUNCTION = 0
 };
 
 
 /**
+ * This typedef is defined to be able to pass a function pointer
+ * as a va_arg in MHD_set_response_options
+ */
+typedef void(*MHD_free_ptr)(void *);
+
+
+/**
  * Set special flags and options for a response.
  *
  * @param response the response to modify
diff -x Makefile -x .deps -x '*.rc' -ur libmicrohttpd-0.9.65/src/microhttpd/response.c libmicrohttpd/src/microhttpd/response.c
--- libmicrohttpd-0.9.65/src/microhttpd/response.c	2019-06-23 15:20:42.000000000 -0400
+++ libmicrohttpd/src/microhttpd/response.c	2019-07-21 21:51:46.837784832 -0400
@@ -400,7 +400,6 @@
   return response;
 }
 
-
 /**
  * Set special flags and options for a response.
  *
@@ -425,6 +424,15 @@
   {
     switch (ro)
     {
+    case MHD_RO_FREE_FUNCTION:
+      va_start (ap, flags);
+      if (NULL != (response->crfc = va_arg (ap, MHD_free_ptr))) {
+        ret = MHD_YES;
+      } else {
+        ret = MHD_NO;
+      }
+      va_end (ap);
+      break;
     default:
       ret = MHD_NO;
       break;