diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 890698c3ab9a..3292edb594ae 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -26,6 +26,7 @@
       </profile>
     </annotationProcessing>
     <bytecodeTargetLevel target="1.6">
+      <module name="annotations" target="1.5" />
       <module name="groovy-rt-constants" target="1.5" />
       <module name="groovy_rt" target="1.5" />
       <module name="java-runtime" target="1.3" />
diff --git a/build/conf/classVersions.txt b/build/conf/classVersions.txt
index f2a055b6577e..7ccac5c4b691 100644
--- a/build/conf/classVersions.txt
+++ b/build/conf/classVersions.txt
@@ -31,7 +31,8 @@
 1.3 => lib/idea_rt.jar
 
 1.7 => lib/fxHelpBrowser.jar
-- => lib/optimizedFileManager.jar
+1.7 => lib/optimizedFileManager.jar
 
 1.5 => plugins/Groovy/lib/groovy_rt.jar
+1.5 => lib/annotations.jar
 
diff --git a/platform/annotations/annotations.iml b/platform/annotations/annotations.iml
index c053808175a3..262fa5663fcd 100644
--- a/platform/annotations/annotations.iml
+++ b/platform/annotations/annotations.iml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module relativePaths="true" type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5" inherit-compiler-output="true">
     <exclude-output />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />