diff --git a/core/src/main/scala-2/sttp/tapir/internal/CaseClassUtil.scala b/core/src/main/scala-2/sttp/tapir/internal/CaseClassUtil.scala
index 30757ad845..59b04366c6 100644
--- a/core/src/main/scala-2/sttp/tapir/internal/CaseClassUtil.scala
+++ b/core/src/main/scala-2/sttp/tapir/internal/CaseClassUtil.scala
@@ -23,7 +23,7 @@ private[tapir] class CaseClassUtil[C <: blackbox.Context, T: C#WeakTypeTag](val
   lazy val instanceFromValues: Tree = if (fields.size == 1) {
     q"$companion.apply(values.head.asInstanceOf[${fields.head.typeSignature}])"
   } else {
-    q"$companion.tupled.asInstanceOf[Any => $t].apply(sttp.tapir.internal.SeqToParams(values))"
+    q"($companion.apply _).tupled.asInstanceOf[Any => $t].apply(sttp.tapir.internal.SeqToParams(values))"
   }
 
   lazy val schema: Tree = c.typecheck(q"_root_.scala.Predef.implicitly[_root_.sttp.tapir.Schema[$t]]")
diff --git a/core/src/test/scala/sttp/tapir/EndpointTest.scala b/core/src/test/scala/sttp/tapir/EndpointTest.scala
index 2f20df18a0..10c780edc0 100644
--- a/core/src/test/scala/sttp/tapir/EndpointTest.scala
+++ b/core/src/test/scala/sttp/tapir/EndpointTest.scala
@@ -401,4 +401,15 @@ class EndpointTest extends AnyFlatSpec with EndpointTestExtensions with Matchers
       |query[Int]("q1").and(query[String]("q2")).mapTo[Wrapper]
     """)
   }
+
+  "mapTo" should "compile for case class with defined companion object" in {
+    assertCompiles("""
+      import sttp.tapir.generic.auto._
+
+      case class Wrapper(i: Int, s: String)
+      object Wrapper
+
+      formBody[Wrapper]
+    """)
+  }
 }