diff --git a/platform/bootstrap/src/com/intellij/idea/Main.java b/platform/bootstrap/src/com/intellij/idea/Main.java
index 5517bb7e2dd5..6dfd695cd299 100644
--- a/platform/bootstrap/src/com/intellij/idea/Main.java
+++ b/platform/bootstrap/src/com/intellij/idea/Main.java
@@ -153,7 +153,7 @@ public class Main {
                          System.getProperty("java.home") + "/bin/java",
                          "-Xmx500m",
                          "-classpath",
-                         copyPatchFile.getPath() + File.pathSeparator + copyPatchFile.getPath() + "/lib/log4j.jar",
+                         copyPatchFile.getPath() + File.pathSeparator + PathManager.getLibPath() + "/log4j.jar",
                          "-Djava.io.tmpdir=" + tempDir,
                          "com.intellij.updater.Runner",
                          "install",