diff --git a/src/backend/storage/ipc/shmem.c b/src/backend/storage/ipc/shmem.c
index 720d30e8f6f..99cf27216ca 100644
--- a/src/backend/storage/ipc/shmem.c
+++ b/src/backend/storage/ipc/shmem.c
@@ -1379,7 +1379,7 @@ pg_get_shmem_allocations_numa(PG_FUNCTION_ARGS)
  * If the shared segment was allocated using huge pages, returns the size of
  * a huge page. Otherwise returns the size of regular memory page.
  *
- * This should be used only after the server is started.
+ * This should be used only after shared memory has been initialized.
  */
 Size
 pg_get_shmem_pagesize(void)
@@ -1394,7 +1394,6 @@ pg_get_shmem_pagesize(void)
 	os_page_size = sysconf(_SC_PAGESIZE);
 #endif
 
-	Assert(IsUnderPostmaster);
 	Assert(huge_pages_status != HUGE_PAGES_UNKNOWN);
 
 	if (huge_pages_status == HUGE_PAGES_ON)