diff --git a/build-tools/build.xml b/build-tools/build.xml
index e9d0befe8e7..45b19aae2cb 100644
--- a/build-tools/build.xml
+++ b/build-tools/build.xml
@@ -125,7 +125,7 @@
     <!-- Creates build tools distribution jar -->
     <target name="buildToolsJar" depends="compile">
         <mkdir dir    ="${output}/classes/buildTools"/>
-        <javac destdir="${output}/classes/buildTools" debug="true" debuglevel="lines,vars,source">
+        <javac destdir="${output}/classes/buildTools" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">
             <src>
                 <dirset dir="${basedir}/build-tools">
                     <include name="core/src"/>
@@ -134,6 +134,7 @@
                     <include name="gradle/src"/>
                 </dirset>
             </src>
+            <compilerarg value="-Xlint:all"/>
             <classpath>
                 <path refid  = "classpath.kotlin"/>
                 <fileset dir = "${idea.sdk}/ant/lib" includes="*.jar"/>
diff --git a/build.xml b/build.xml
index 04e3e59b9e5..32935e52248 100644
--- a/build.xml
+++ b/build.xml
@@ -32,7 +32,7 @@
 
     <target name="compileRT">
         <mkdir dir="${output}/classes/runtime"/>
-        <javac destdir="${output}/classes/runtime" debug="true" debuglevel="lines,vars,source">
+        <javac destdir="${output}/classes/runtime" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">
             <src path="${basedir}/stdlib/src"/>
             <classpath refid="classpath"/>
         </javac>
@@ -61,7 +61,7 @@
 
     <target name="compile" depends="compileRT">
         <mkdir dir="${output}/classes/compiler"/>
-        <javac destdir="${output}/classes/compiler" debug="true" debuglevel="lines,vars,source">
+        <javac destdir="${output}/classes/compiler" debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">
             <src refid="sourcepath"/>
             <classpath refid="classpath"/>
         </javac>