diff --git a/dbms/src/Parsers/ASTConstraintDeclaration.cpp b/dbms/src/Parsers/ASTConstraintDeclaration.cpp
index 834ac81891b..a1b063fc44a 100644
--- a/dbms/src/Parsers/ASTConstraintDeclaration.cpp
+++ b/dbms/src/Parsers/ASTConstraintDeclaration.cpp
@@ -1,6 +1,7 @@
 #include <Parsers/ASTConstraintDeclaration.h>
 
-namespace DB {
+namespace DB
+{
 
 ASTPtr ASTConstraintDeclaration::clone() const
 {
@@ -25,4 +26,4 @@ void ASTConstraintDeclaration::formatImpl(const FormatSettings & s, FormatState
     expr->formatImpl(s, state, frame);
 }
 
-}
\ No newline at end of file
+}