diff --git a/src/backend/utils/adt/jsonfuncs.c b/src/backend/utils/adt/jsonfuncs.c
index 1f8ea51e6a..69cdd84393 100644
--- a/src/backend/utils/adt/jsonfuncs.c
+++ b/src/backend/utils/adt/jsonfuncs.c
@@ -990,7 +990,7 @@ jsonb_array_element_text(PG_FUNCTION_ARGS)
     {
         uint32      nelements = JB_ROOT_COUNT(jb);

-        if (-element > nelements)
+        if (pg_abs_s32(element) > nelements)
             PG_RETURN_NULL();
         else
             element += nelements;