diff --git a/tools/idea/src/main/java/org/teavm/idea/devserver/DevServerRunner.java b/tools/idea/src/main/java/org/teavm/idea/devserver/DevServerRunner.java
index 887dcc563..bb22f9b6f 100644
--- a/tools/idea/src/main/java/org/teavm/idea/devserver/DevServerRunner.java
+++ b/tools/idea/src/main/java/org/teavm/idea/devserver/DevServerRunner.java
@@ -149,6 +149,7 @@ public class DevServerRunner extends UnicastRemoteObject implements DevServerMan
             }
         }
         server.setClassPath(classPath.toArray(new String[0]));
+        server.setCompileOnStartup(true);
 
         DevServerRunner daemon = new DevServerRunner(server);
         System.out.println(PORT_MESSAGE_PREFIX + daemon.port);