diff --git a/build.xml b/build.xml
index 697ab76b51b..027da9dd851 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"/>
     <!-- Set to false to disable compiler's javadoc generation. Speeds up the build -->
     <property name="generate.javadoc" value="true"/>