diff --git a/ydb/core/protos/feature_flags.proto b/ydb/core/protos/feature_flags.proto
index 8674daffc41c..1713b91849b8 100644
--- a/ydb/core/protos/feature_flags.proto
+++ b/ydb/core/protos/feature_flags.proto
@@ -148,5 +148,5 @@ message TFeatureFlags {
     optional bool EnableChangefeedsOnIndexTables = 134 [default = false];
     optional bool EnableResourcePoolsCounters = 135 [default = false];
     optional bool EnableOptionalColumnsInColumnShard = 136 [default = false];
-    optional bool EnablePgSyntax = 139 [default = true];
+    optional bool EnablePgSyntax = 139 [default = false];
 }