diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h
index 0f4402fd96e..d1f99fbafef 100644
--- a/src/include/pg_config_manual.h
+++ b/src/include/pg_config_manual.h
@@ -281,7 +281,7 @@
  * 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;