diff --git a/doc/src/sgml/xfunc.sgml b/doc/src/sgml/xfunc.sgml
index cb3cc09f16d..2b8a11e7ad0 100644
--- a/doc/src/sgml/xfunc.sgml
+++ b/doc/src/sgml/xfunc.sgml
@@ -3740,7 +3740,7 @@ my_shmem_init(void *arg)
       on whether the requested memory areas were already initialized by
       another backend. The callbacks will be called while holding an internal
       lock (ShmemIndexLock), which prevents the race condition of two backends
-      trying to initializing the memory area at the same time.
+      trying to initialize the memory area at the same time.
      </para>
     </sect3>