diff --git a/src/Platforms/AbstractPlatform.php b/src/Platforms/AbstractPlatform.php
index 2060fbb74ad..c02fad4b76a 100644
--- a/src/Platforms/AbstractPlatform.php
+++ b/src/Platforms/AbstractPlatform.php
@@ -1776,6 +1776,8 @@ public function getCreateConstraintSQL(Constraint $constraint, $table)
                     'Can only create primary or unique constraints, no common indexes with getCreateConstraintSQL().'
                 );
             }
+        } elseif ($constraint instanceof UniqueConstraint) {
+            $query .= ' UNIQUE';
         } elseif ($constraint instanceof ForeignKeyConstraint) {
             $query .= ' FOREIGN KEY';
 
diff --git a/tests/Platforms/AbstractPlatformTestCase.php b/tests/Platforms/AbstractPlatformTestCase.php
index f737da68ab6..520fcc7255b 100644
--- a/tests/Platforms/AbstractPlatformTestCase.php
+++ b/tests/Platforms/AbstractPlatformTestCase.php
@@ -258,6 +258,10 @@ public function testGeneratesConstraintCreationSql(): void
         $sql = $this->platform->getCreateConstraintSQL($pk, 'test');
         self::assertEquals($this->getGenerateConstraintPrimaryIndexSql(), $sql);
 
+        $uc  = new UniqueConstraint('constraint_name', ['test']);
+        $sql = $this->platform->getCreateConstraintSQL($uc, 'test');
+        self::assertEquals($this->getGenerateConstraintUniqueIndexSql(), $sql);
+
         $fk  = new ForeignKeyConstraint(['fk_name'], 'foreign', ['id'], 'constraint_fk');
         $sql = $this->platform->getCreateConstraintSQL($fk, 'test');
         self::assertEquals($this->getGenerateConstraintForeignKeySql($fk), $sql);