diff --git a/doc/src/sgml/storage.sgml b/doc/src/sgml/storage.sgml
index e0a93c1b5eb..6cc0e9cbcd6 100644
--- a/doc/src/sgml/storage.sgml
+++ b/doc/src/sgml/storage.sgml
@@ -72,6 +72,12 @@ Item
  <entry>Subdirectory containing transaction commit status data</entry>
 </row>
 
+<row>
+ <entry><filename>pg_dynshmem</></entry>
+ <entry>Subdirectory containing files used by the dynamic shared memory
+  subsystem</entry>
+</row>
+
 <row>
  <entry><filename>pg_multixact</></entry>
  <entry>Subdirectory containing multitransaction status data
diff --git a/src/backend/utils/resowner/resowner.c b/src/backend/utils/resowner/resowner.c
index ba177015799..34a42cdce95 100644
--- a/src/backend/utils/resowner/resowner.c
+++ b/src/backend/utils/resowner/resowner.c
@@ -1301,7 +1301,7 @@ ResourceOwnerRememberDSM(ResourceOwner owner, dsm_segment *seg)
 }
 
 /*
- * Forget that a temporary file is owned by a ResourceOwner
+ * Forget that a dynamic shmem segment is owned by a ResourceOwner
  */
 void
 ResourceOwnerForgetDSM(ResourceOwner owner, dsm_segment *seg)