diff --git a/lib/http2.c b/lib/http2.c
index f8e23c517..98fc147a9 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -2134,12 +2134,15 @@ CURLcode Curl_http2_switched(struct connectdata *conn,
   return CURLE_OK;
 }
 
-void Curl_http2_add_child(struct Curl_easy *parent, struct Curl_easy *child,
-                          bool exclusive)
+CURLcode Curl_http2_add_child(struct Curl_easy *parent,
+                              struct Curl_easy *child,
+                              bool exclusive)
 {
   if(parent) {
     struct Curl_http2_dep **tail;
     struct Curl_http2_dep *dep = calloc(1, sizeof(struct Curl_http2_dep));
+    if(!dep)
+      return CURLE_OUT_OF_MEMORY;
     dep->data = child;
 
     if(parent->set.stream_dependents && exclusive) {
@@ -2170,6 +2173,7 @@ void Curl_http2_add_child(struct Curl_easy *parent, struct Curl_easy *child,
 
   child->set.stream_depends_on = parent;
   child->set.stream_depends_e = exclusive;
+  return CURLE_OK;
 }
 
 void Curl_http2_remove_child(struct Curl_easy *parent, struct Curl_easy *child)
diff --git a/lib/http2.h b/lib/http2.h
index f405b3aeb..f597c805e 100644
--- a/lib/http2.h
+++ b/lib/http2.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -53,8 +53,9 @@ void Curl_http2_setup_conn(struct connectdata *conn);
 void Curl_http2_setup_req(struct Curl_easy *data);
 void Curl_http2_done(struct connectdata *conn, bool premature);
 CURLcode Curl_http2_done_sending(struct connectdata *conn);
-void Curl_http2_add_child(struct Curl_easy *parent, struct Curl_easy *child,
-                          bool exclusive);
+CURLcode Curl_http2_add_child(struct Curl_easy *parent,
+                              struct Curl_easy *child,
+                              bool exclusive);
 void Curl_http2_remove_child(struct Curl_easy *parent,
                              struct Curl_easy *child);
 void Curl_http2_cleanup_dependencies(struct Curl_easy *data);