diff --git a/include/http_request.h b/include/http_request.h
index 97591e3e3e..595042bb25 100644
--- a/include/http_request.h
+++ b/include/http_request.h
@@ -316,7 +316,7 @@ AP_DECLARE(void) ap_allow_standard_methods(request_rec *r, int reset, ...);
  * the response to the client
  * @param r The current request
  */
-void ap_process_request(request_rec *r);
+AP_DECLARE(void) ap_process_request(request_rec *r);
 
 /* For post-processing after a handler has finished with a request.
  * (Commonly used after it was suspended)
diff --git a/modules/http/http_request.c b/modules/http/http_request.c
index 7b06def940..70bf2937c0 100644
--- a/modules/http/http_request.c
+++ b/modules/http/http_request.c
@@ -363,7 +363,7 @@ void ap_process_async_request(request_rec *r)
     ap_process_request_after_handler(r);
 }
 
-void ap_process_request(request_rec *r)
+AP_DECLARE(void) ap_process_request(request_rec *r)
 {
     apr_bucket_brigade *bb;
     apr_bucket *b;