diff --git a/compiler/src/dotty/tools/dotc/ast/Desugar.scala b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
index 15cb0b665a5d..50463efb8853 100644
--- a/compiler/src/dotty/tools/dotc/ast/Desugar.scala
+++ b/compiler/src/dotty/tools/dotc/ast/Desugar.scala
@@ -345,8 +345,9 @@ object desugar {
           DefDef(name, Nil, Nil, TypeTree(), rhs).withMods(synthetic)
         val isDefinedMeth = syntheticProperty(nme.isDefined, Literal(Constant(true)))
         val caseParams = constrVparamss.head.toArray
-        val productElemMeths = for (i <- 0 until arity) yield
-          syntheticProperty(nme.selectorName(i), Select(This(EmptyTypeIdent), caseParams(i).name))
+        val productElemMeths =
+          for (i <- 0 until arity if nme.selectorName(i) `ne` caseParams(i).name)
+          yield syntheticProperty(nme.selectorName(i), Select(This(EmptyTypeIdent), caseParams(i).name))
         def isRepeated(tree: Tree): Boolean = tree match {
           case PostfixOp(_, nme.raw.STAR) => true
           case ByNameTypeTree(tree1) => isRepeated(tree1)
diff --git a/tests/pos/i1797.scala b/tests/pos/i1797.scala
new file mode 100644
index 000000000000..1f10082b78db
--- /dev/null
+++ b/tests/pos/i1797.scala
@@ -0,0 +1 @@
+case class Tuple1[T](_1: T)