diff --git a/main/src/main/scala/sbt/dsl/package.scala b/main/src/main/scala/sbt/dsl/package.scala
index f7f1df2e3..6d56b3acb 100644
--- a/main/src/main/scala/sbt/dsl/package.scala
+++ b/main/src/main/scala/sbt/dsl/package.scala
@@ -5,7 +5,8 @@ import internals.{
   DslConfigs,
   DslEnablePlugins,
   DslDisablePlugins,
-  DslDependsOn
+  DslDependsOn,
+  DslAggregate
 }
 
 package object dsl {
@@ -13,4 +14,6 @@ package object dsl {
   def disablePlugins(ps: AutoPlugin*): DslEntry = DslDisablePlugins(ps)
   def configs(cs: Configuration*): DslEntry = DslConfigs(cs)
   def dependsOn(deps: ClasspathDep[ProjectReference]*): DslEntry = DslDependsOn(deps)
+  // avoid conflict with `sbt.Keys.aggregate`
+  def aggregateProjects(refs: ProjectReference*): DslEntry = DslAggregate(refs)
 }
diff --git a/main/src/main/scala/sbt/internals/DslAst.scala b/main/src/main/scala/sbt/internals/DslAst.scala
index bac7f08a1..80f6ae326 100644
--- a/main/src/main/scala/sbt/internals/DslAst.scala
+++ b/main/src/main/scala/sbt/internals/DslAst.scala
@@ -62,3 +62,7 @@ case class DslConfigs(cs: Seq[Configuration]) extends ProjectManipulation {
 case class DslDependsOn(cs: Seq[ClasspathDep[ProjectReference]]) extends ProjectManipulation {
   override val toFunction: Project => Project = _.dependsOn(cs: _*)
 }
+/** this represents an `aggregate()` in the sbt DSL */
+case class DslAggregate(refs: Seq[ProjectReference]) extends ProjectManipulation {
+  override val toFunction: Project => Project = _.aggregate(refs: _*)
+}
diff --git a/notes/0.13.13/aggregate-build-sbt.md b/notes/0.13.13/aggregate-build-sbt.md
new file mode 100644
index 000000000..ef459e2e9
--- /dev/null
+++ b/notes/0.13.13/aggregate-build-sbt.md
@@ -0,0 +1,5 @@
+  [@xuwei-k]: https://github.com/xuwei-k
+
+### Improvements
+
+- Add the ability to call aggregate for the current project inside a build sbt file. By [@xuwei-k][@xuwei-k]
diff --git a/sbt/src/sbt-test/project/aggregate/build.sbt b/sbt/src/sbt-test/project/aggregate/build.sbt
new file mode 100644
index 000000000..4c3ce9830
--- /dev/null
+++ b/sbt/src/sbt-test/project/aggregate/build.sbt
@@ -0,0 +1,3 @@
+aggregateProjects(
+  RootProject(file("projA"))
+)
diff --git a/sbt/src/sbt-test/project/aggregate/projA/A.scala b/sbt/src/sbt-test/project/aggregate/projA/A.scala
new file mode 100644
index 000000000..83d15dc73
--- /dev/null
+++ b/sbt/src/sbt-test/project/aggregate/projA/A.scala
@@ -0,0 +1 @@
+class A
diff --git a/sbt/src/sbt-test/project/aggregate/projA/build.sbt b/sbt/src/sbt-test/project/aggregate/projA/build.sbt
new file mode 100644
index 000000000..88a866ee1
--- /dev/null
+++ b/sbt/src/sbt-test/project/aggregate/projA/build.sbt
@@ -0,0 +1,3 @@
+name := "projA"
+
+scalaVersion := "2.11.8"
diff --git a/sbt/src/sbt-test/project/aggregate/test b/sbt/src/sbt-test/project/aggregate/test
new file mode 100644
index 000000000..1cb4f2bba
--- /dev/null
+++ b/sbt/src/sbt-test/project/aggregate/test
@@ -0,0 +1,2 @@
+> compile
+$ exists projA/target/scala-2.11/classes/A.class