diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 6b202e0..0677059 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -5150,7 +5150,7 @@ set_config_option(const char *name, const char *value,
 			elevel = IsUnderPostmaster ? DEBUG3 : LOG;
 		}
 		else if (source == PGC_S_DATABASE || source == PGC_S_USER ||
-				 source == PGC_S_DATABASE_USER)
+				 source == PGC_S_DATABASE_USER || source == PG_S_SESSION)
 			elevel = WARNING;
 		else
 			elevel = ERROR;