From 119360df4ca503016793afc3d8264d29a4cf9392 Mon Sep 17 00:00:00 2001
From: alimcmaster1 <alimcmaster1@gmail.com>
Date: Sun, 2 Feb 2020 17:09:18 +0000
Subject: [PATCH] BUG: objToJson.c - fix return value (#31482)

---
 doc/source/whatsnew/v1.0.1.rst            | 2 +-
 pandas/_libs/src/ujson/python/objToJSON.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/source/whatsnew/v1.0.1.rst b/doc/source/whatsnew/v1.0.1.rst
index 801d97b777e00..16d9d341f785d 100644
--- a/doc/source/whatsnew/v1.0.1.rst
+++ b/doc/source/whatsnew/v1.0.1.rst
@@ -128,7 +128,7 @@ ExtensionArray
 
 Other
 ^^^^^
--
+- Regression fixed in objTOJSON.c fix return-type warning (:issue:`31463`)
 -
 
 .. ---------------------------------------------------------------------------
diff --git a/pandas/_libs/src/ujson/python/objToJSON.c b/pandas/_libs/src/ujson/python/objToJSON.c
index 62c2870c198c4..da85196550c9f 100644
--- a/pandas/_libs/src/ujson/python/objToJSON.c
+++ b/pandas/_libs/src/ujson/python/objToJSON.c
@@ -177,6 +177,8 @@ void *initObjToJSON(void) {
 
     /* Initialise numpy API */
     import_array();
+    // GH 31463
+    return NULL;
 }
 
 static TypeContext *createTypeContext(void) {