diff --git a/main/src/main/scala/sbt/Project.scala b/main/src/main/scala/sbt/Project.scala
index e9ec9e074..68b874d89 100755
--- a/main/src/main/scala/sbt/Project.scala
+++ b/main/src/main/scala/sbt/Project.scala
@@ -592,6 +592,8 @@ trait ProjectExtra {
 
   implicit def richTaskSessionVar[T](init: Initialize[Task[T]]): Project.RichTaskSessionVar[T] = new Project.RichTaskSessionVar(init)
 
+  def inThisBuild(ss: Seq[Setting[_]]): Seq[Setting[_]] =
+    inScope(ThisScope.copy(project = Select(ThisBuild)))(ss)
   def inConfig(conf: Configuration)(ss: Seq[Setting[_]]): Seq[Setting[_]] =
     inScope(ThisScope.copy(config = Select(conf)))((configuration :== conf) +: ss)
   def inTask(t: Scoped)(ss: Seq[Setting[_]]): Seq[Setting[_]] =
@@ -599,6 +601,8 @@ trait ProjectExtra {
   def inScope(scope: Scope)(ss: Seq[Setting[_]]): Seq[Setting[_]] =
     Project.transform(Scope.replaceThis(scope), ss)
 
+  private[sbt] def inThisBuild[T](i: Initialize[T]): Initialize[T] =
+    inScope(ThisScope.copy(project = Select(ThisBuild)), i)
   private[sbt] def inConfig[T](conf: Configuration, i: Initialize[T]): Initialize[T] =
     inScope(ThisScope.copy(config = Select(conf)), i)
   private[sbt] def inTask[T](t: Scoped, i: Initialize[T]): Initialize[T] =
diff --git a/notes/0.13.9/in-this-build.markdown b/notes/0.13.9/in-this-build.markdown
new file mode 100644
index 000000000..735e38fde
--- /dev/null
+++ b/notes/0.13.9/in-this-build.markdown
@@ -0,0 +1,12 @@
+
+  [@dwijnand]: http://github.com/dwijnand
+  [1847]: https://github.com/sbt/sbt/issues/1847
+  [1989]: https://github.com/sbt/sbt/pull/1989
+
+### Fixes with compatibility implications
+
+### Improvements
+
+- Add `inThisBuild`, similar to `inConfig`, to allow specifying multiple settings in `ThisBuild` scope. [#1847][1847]/[#1989][1989] by [@dwijnand][@dwijnand]
+
+### Bug fixes
diff --git a/sbt/src/sbt-test/project/in-this-build/build.sbt b/sbt/src/sbt-test/project/in-this-build/build.sbt
new file mode 100644
index 000000000..eeb4b8b72
--- /dev/null
+++ b/sbt/src/sbt-test/project/in-this-build/build.sbt
@@ -0,0 +1,11 @@
+val a = settingKey[Int]("an int")
+
+inThisBuild (
+  a := 1
+)
+
+val p = project
+
+TaskKey[Unit]("check") := {
+  assert((a in p).?.value == Option(1), s"a in p should be Some(1) but is ${(a in p).?.value}")
+}
diff --git a/sbt/src/sbt-test/project/in-this-build/test b/sbt/src/sbt-test/project/in-this-build/test
new file mode 100644
index 000000000..15675b169
--- /dev/null
+++ b/sbt/src/sbt-test/project/in-this-build/test
@@ -0,0 +1 @@
+> check