diff --git a/.pick_status.json b/.pick_status.json
index 01e4358cc84..220bffce359 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -3414,7 +3414,7 @@
         "description": "util: Fix use of undeclared identifier 'NULL' in src/util/os_misc.h when compiling with clang",
         "nominated": true,
         "nomination_type": 2,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "2771eb39fd5a915c256c1be335a32c9aba3da172",
         "notes": null
diff --git a/src/util/os_misc.h b/src/util/os_misc.h
index 03cd59c3683..9b411ac7126 100644
--- a/src/util/os_misc.h
+++ b/src/util/os_misc.h
@@ -36,6 +36,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <stddef.h>
 
 #include "util/detect.h"