diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h
index 5f4cf93a24..6c8e31269c 100644
--- a/src/include/pg_config_manual.h
+++ b/src/include/pg_config_manual.h
@@ -218,7 +218,7 @@
  * Enable debugging print statements for WAL-related operations; see
  * also the wal_debug GUC var.
  */
-#define WAL_DEBUG
+/* #define WAL_DEBUG */
 
 /*
  * Enable tracing of resource consumption during sort operations;