diff --git a/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php b/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php
index c1da7ab8e83..2b45883b3fa 100644
--- a/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php
@@ -532,7 +532,7 @@ public function getAlterTableSQL(TableDiff $diff)
                     );
                 } elseif ($hasFromComment && ! $hasComment) {
                     $commentsSql[] = $this->getDropColumnCommentSQL($diff->name, $column->getQuotedName($this));
-                } elseif ($hasComment) {
+                } elseif (! $hasFromComment && $hasComment) {
                     $commentsSql[] = $this->getCreateColumnCommentSQL(
                         $diff->name,
                         $column->getQuotedName($this),
diff --git a/tests/Doctrine/Tests/DBAL/Functional/Schema/SQLServerSchemaManagerTest.php b/tests/Doctrine/Tests/DBAL/Functional/Schema/SQLServerSchemaManagerTest.php
index 8b0bd707ee5..045299367b6 100644
--- a/tests/Doctrine/Tests/DBAL/Functional/Schema/SQLServerSchemaManagerTest.php
+++ b/tests/Doctrine/Tests/DBAL/Functional/Schema/SQLServerSchemaManagerTest.php
@@ -178,12 +178,13 @@ public function testColumnComments(): void
         $table->addColumn('create', 'integer', ['comment' => 'Doctrine 0wnz comments for reserved keyword columns!']);
         $table->addColumn('commented_type', 'object');
         $table->addColumn('commented_type_with_comment', 'array', ['comment' => 'Doctrine array type.']);
+        $table->addColumn('commented_req_change_column', 'integer', ['comment' => 'Some comment', 'notnull' => true]);
         $table->setPrimaryKey(['id']);
 
         $this->schemaManager->createTable($table);
 
         $columns = $this->schemaManager->listTableColumns('sqlsrv_column_comment');
-        self::assertCount(12, $columns);
+        self::assertCount(13, $columns);
         self::assertNull($columns['id']->getComment());
         self::assertNull($columns['comment_null']->getComment());
         self::assertNull($columns['comment_false']->getComment());
@@ -199,6 +200,7 @@ public function testColumnComments(): void
         self::assertEquals('Doctrine 0wnz comments for reserved keyword columns!', $columns['[create]']->getComment());
         self::assertNull($columns['commented_type']->getComment());
         self::assertEquals('Doctrine array type.', $columns['commented_type_with_comment']->getComment());
+        self::assertEquals('Some comment', $columns['commented_req_change_column']->getComment());
 
         $tableDiff            = new TableDiff('sqlsrv_column_comment');
         $tableDiff->fromTable = $table;
@@ -326,13 +328,29 @@ public function testColumnComments(): void
             new Column('commented_type_with_comment', Type::getType('array'), ['comment' => 'Doctrine array type.'])
         );
 
+        // Change column requirements without changing comment.
+        $tableDiff->changedColumns['commented_req_change_column'] = new ColumnDiff(
+            'commented_req_change_column',
+            new Column(
+                'commented_req_change_column',
+                Type::getType('integer'),
+                ['comment' => 'Some comment', 'notnull' => true]
+            ),
+            ['notnull'],
+            new Column(
+                'commented_req_change_column',
+                Type::getType('integer'),
+                ['comment' => 'Some comment', 'notnull' => false]
+            ),
+        );
+
         $tableDiff->removedColumns['comment_integer_0']
             = new Column('comment_integer_0', Type::getType('integer'), ['comment' => 0]);
 
         $this->schemaManager->alterTable($tableDiff);
 
         $columns = $this->schemaManager->listTableColumns('sqlsrv_column_comment');
-        self::assertCount(23, $columns);
+        self::assertCount(24, $columns);
         self::assertEquals('primary', $columns['id']->getComment());
         self::assertNull($columns['comment_null']->getComment());
         self::assertEquals('false', $columns['comment_false']->getComment());
@@ -356,6 +374,7 @@ public function testColumnComments(): void
         self::assertEquals('666', $columns['[select]']->getComment());
         self::assertNull($columns['added_commented_type']->getComment());
         self::assertEquals('666', $columns['added_commented_type_with_comment']->getComment());
+        self::assertEquals('Some comment', $columns['commented_req_change_column']->getComment());
     }
 
     public function testPkOrdering(): void
diff --git a/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php b/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php
index ddb7df84a00..7a63f3ffccf 100644
--- a/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php
+++ b/tests/Doctrine/Tests/DBAL/Platforms/AbstractSQLServerPlatformTestCase.php
@@ -1718,4 +1718,19 @@ private function expectCteWithMinAndMaxRowNums(
             . ') AS doctrine_tbl WHERE doctrine_rownum >= %d AND doctrine_rownum <= %d ORDER BY doctrine_rownum ASC';
         self::assertEquals(sprintf($pattern, $expectedSql, $expectedMin, $expectedMax), $sql);
     }
+
+    public function testAlterTableWithSchemaSameColumnComments(): void
+    {
+        $tableDiff                          = new TableDiff('testschema.mytable');
+        $tableDiff->changedColumns['quota'] = new ColumnDiff(
+            'quota',
+            new Column('quota', Type::getType('integer'), ['comment' => 'A comment', 'notnull' => true]),
+            ['notnull'],
+            new Column('quota', Type::getType('integer'), ['comment' => 'A comment', 'notnull' => false])
+        );
+
+        $expectedSql = ['ALTER TABLE testschema.mytable ALTER COLUMN quota INT NOT NULL'];
+
+        self::assertEquals($expectedSql, $this->platform->getAlterTableSQL($tableDiff));
+    }
 }