diff --git a/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php b/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
index e3ce138fe0f..a4423d6cfce 100644
--- a/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
@@ -46,6 +46,8 @@
 use function in_array;
 use function is_array;
 use function is_bool;
+use function is_float;
+use function is_int;
 use function is_string;
 use function preg_quote;
 use function preg_replace;
@@ -2011,6 +2013,10 @@ public function getDefaultValueDeclarationSQL(array $field) : string
             return " DEFAULT '" . $this->convertBooleans($default) . "'";
         }
 
+        if (is_int($default) || is_float($default)) {
+            return ' DEFAULT ' . $default;
+        }
+
         return ' DEFAULT ' . $this->quoteStringLiteral($default);
     }
 
diff --git a/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php b/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php
index f2219ff918c..cbfe175702c 100644
--- a/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php
+++ b/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php
@@ -1063,12 +1063,9 @@ public function testColumnDefaultLifecycle() : void
         $table = new Table('col_def_lifecycle');
         $table->addColumn('id', 'integer', ['autoincrement' => true]);
         $table->addColumn('column1', 'string', ['default' => null]);
-        $table->addColumn('column2', 'string', ['default' => false]);
-        $table->addColumn('column3', 'string', ['default' => true]);
-        $table->addColumn('column4', 'string', ['default' => 0]);
-        $table->addColumn('column5', 'string', ['default' => '']);
-        $table->addColumn('column6', 'string', ['default' => 'def']);
-        $table->addColumn('column7', 'integer', ['default' => 0]);
+        $table->addColumn('column2', 'string', ['default' => '']);
+        $table->addColumn('column3', 'string', ['default' => 'default1']);
+        $table->addColumn('column4', 'integer', ['default' => 0]);
         $table->setPrimaryKey(['id']);
 
         $this->schemaManager->dropAndCreateTable($table);
@@ -1078,21 +1075,15 @@ public function testColumnDefaultLifecycle() : void
         self::assertNull($columns['id']->getDefault());
         self::assertNull($columns['column1']->getDefault());
         self::assertSame('', $columns['column2']->getDefault());
-        self::assertSame('1', $columns['column3']->getDefault());
+        self::assertSame('default1', $columns['column3']->getDefault());
         self::assertSame('0', $columns['column4']->getDefault());
-        self::assertSame('', $columns['column5']->getDefault());
-        self::assertSame('def', $columns['column6']->getDefault());
-        self::assertSame('0', $columns['column7']->getDefault());
 
         $diffTable = clone $table;
 
-        $diffTable->changeColumn('column1', ['default' => false]);
+        $diffTable->changeColumn('column1', ['default' => '']);
         $diffTable->changeColumn('column2', ['default' => null]);
-        $diffTable->changeColumn('column3', ['default' => false]);
+        $diffTable->changeColumn('column3', ['default' => 'default2']);
         $diffTable->changeColumn('column4', ['default' => null]);
-        $diffTable->changeColumn('column5', ['default' => false]);
-        $diffTable->changeColumn('column6', ['default' => 666]);
-        $diffTable->changeColumn('column7', ['default' => null]);
 
         $comparator = new Comparator();
 
@@ -1102,11 +1093,8 @@ public function testColumnDefaultLifecycle() : void
 
         self::assertSame('', $columns['column1']->getDefault());
         self::assertNull($columns['column2']->getDefault());
-        self::assertSame('', $columns['column3']->getDefault());
+        self::assertSame('default2', $columns['column3']->getDefault());
         self::assertNull($columns['column4']->getDefault());
-        self::assertSame('', $columns['column5']->getDefault());
-        self::assertSame('666', $columns['column6']->getDefault());
-        self::assertNull($columns['column7']->getDefault());
     }
 
     public function testListTableWithBinary() : void
diff --git a/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php b/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php
index 0b8e554300d..fb90d8105f2 100644
--- a/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php
+++ b/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php
@@ -1032,9 +1032,9 @@ public function testChangeColumnsTypeWithDefaultValue() : void
 
         $tableDiff->changedColumns['col_string'] = new ColumnDiff(
             'col_string',
-            new Column('col_string', Type::getType('string'), ['default' => 666, 'fixed' => true]),
+            new Column('col_string', Type::getType('string'), ['default' => 'bar', 'fixed' => true]),
             ['fixed'],
-            new Column('col_string', Type::getType('string'), ['default' => 666])
+            new Column('col_string', Type::getType('string'), ['default' => 'foo'])
         );
 
         $expected = $this->platform->getAlterTableSQL($tableDiff);
@@ -1047,7 +1047,7 @@ public function testChangeColumnsTypeWithDefaultValue() : void
                 'ALTER TABLE column_def_change_type ADD CONSTRAINT DF_829302E0_FA2CB292 DEFAULT 666 FOR col_int',
                 'ALTER TABLE column_def_change_type DROP CONSTRAINT DF_829302E0_2725A6D0',
                 'ALTER TABLE column_def_change_type ALTER COLUMN col_string NCHAR(255) NOT NULL',
-                "ALTER TABLE column_def_change_type ADD CONSTRAINT DF_829302E0_2725A6D0 DEFAULT '666' FOR col_string",
+                "ALTER TABLE column_def_change_type ADD CONSTRAINT DF_829302E0_2725A6D0 DEFAULT 'bar' FOR col_string",
             ]
         );
     }