diff --git a/build.xml b/build.xml
index fe4f1739a3c..73b7663121f 100644
--- a/build.xml
+++ b/build.xml
@@ -1,7 +1,7 @@
 <project name="Kotlin" default="dist">
 
     <!-- Set to false to disable proguard run on kotlin-compiler.jar. Speeds up the build -->
-    <property name="shrink" value="false"/>
+    <property name="shrink" value="true"/>
 
     <property name="output" value="${basedir}/dist"/>
     <property name="kotlin-home" value="${output}/kotlinc"/>