diff --git a/NEWS.md b/NEWS.md
index 7ff8a7d5c2..05e2d41eb9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -160,7 +160,7 @@ Outstanding ones only.
 
     * Process.\_fork is added. This is a core method for fork(2).
       Do not call this method directly; it is called by existing
-      fork methods: Kernel.#fork, Process.fork, and popen("=").
+      fork methods: Kernel.#fork, Process.fork, and IO.popen("-").
       Application monitoring libraries can overwride this method to
       hook fork event. [[Feature #17795]]