diff --git a/main-settings/src/main/scala/sbt/std/InputConvert.scala b/main-settings/src/main/scala/sbt/std/InputConvert.scala
index ca0ec290c..e27bde995 100644
--- a/main-settings/src/main/scala/sbt/std/InputConvert.scala
+++ b/main-settings/src/main/scala/sbt/std/InputConvert.scala
@@ -48,13 +48,13 @@ object FullConvert extends Convert {
       case _                => Converted.NotApplicable[c.type]
     }
 
-  private def wrapInit[T](c: blackbox.Context)(tree: c.Tree): Converted[c.type] = {
+  private def wrapInit[T: c.WeakTypeTag](c: blackbox.Context)(tree: c.Tree): Converted[c.type] = {
     val i = c.Expr[Initialize[T]](tree)
     val t = c.universe.reify(Def.toITask(i.splice)).tree
     Converted.Success[c.type](t)
   }
 
-  private def wrapTask[T](c: blackbox.Context)(tree: c.Tree): Converted[c.type] = {
+  private def wrapTask[T: c.WeakTypeTag](c: blackbox.Context)(tree: c.Tree): Converted[c.type] = {
     val i = c.Expr[Task[T]](tree)
     val t = c.universe.reify(Def.valueStrict[Task[T]](i.splice)).tree
     Converted.Success[c.type](t)
diff --git a/main-settings/src/main/scala/sbt/std/SettingMacro.scala b/main-settings/src/main/scala/sbt/std/SettingMacro.scala
index 1fc0dda4a..a45e22699 100644
--- a/main-settings/src/main/scala/sbt/std/SettingMacro.scala
+++ b/main-settings/src/main/scala/sbt/std/SettingMacro.scala
@@ -25,7 +25,7 @@ object InitializeConvert extends Convert {
       case _                                                         => Converted.NotApplicable
     }
 
-  private def convert[T](c: blackbox.Context)(in: c.Tree): Converted[c.type] =
+  private def convert[T: c.WeakTypeTag](c: blackbox.Context)(in: c.Tree): Converted[c.type] =
     {
       val i = c.Expr[Initialize[T]](in)
       val t = c.universe.reify(i.splice).tree