diff --git a/build.xml b/build.xml
index 744da7f008e..d57b4de722a 100644
--- a/build.xml
+++ b/build.xml
@@ -1123,6 +1123,7 @@
     <target name="mock-runtime-for-test">
         <delete dir="${output}/mock-runtime-src" failonerror="false"/>
         <mkdir dir="${output}/mock-runtime-src"/>
+        <copy file="${basedir}/core/runtime.jvm/src/kotlin/TypeAliases.kt" todir="${output}/mock-runtime-src"/>
         <copy file="${basedir}/libraries/stdlib/src/kotlin/util/Standard.kt" todir="${output}/mock-runtime-src"/>
         <copy file="${basedir}/libraries/stdlib/src/kotlin/internal/Annotations.kt" todir="${output}/mock-runtime-src"/>