diff --git a/include/exec/memory.h b/include/exec/memory.h
index c158fd7084..b114f5454b 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -571,7 +571,7 @@ struct MemoryListener {
      * @log_start:
      *
      * Called during an address space update transaction, after
-     * one of #MemoryListener.region_add(),#MemoryListener.region_del() or
+     * one of #MemoryListener.region_add(), #MemoryListener.region_del() or
      * #MemoryListener.region_nop(), if dirty memory logging clients have
      * become active since the last transaction.
      *