diff --git a/jps/src/org/jetbrains/jps/builders/StandardBuilders.groovy b/jps/src/org/jetbrains/jps/builders/StandardBuilders.groovy
index 92e395bf7549..babacca78d33 100644
--- a/jps/src/org/jetbrains/jps/builders/StandardBuilders.groovy
+++ b/jps/src/org/jetbrains/jps/builders/StandardBuilders.groovy
@@ -283,7 +283,7 @@ class GroovyStubGenerator implements ModuleBuilder {
 class JetBrainsInstrumentations implements ModuleBuilder {
   static class CustomFormInstrumenter extends
           FormInstrumenter {
-    final List<String> formFiles;
+    final List<File> formFiles;
     final ModuleBuildState state;
 
     @Override
@@ -306,7 +306,7 @@ class JetBrainsInstrumentations implements ModuleBuilder {
       throw new RuntimeException(msg);
     }
 
-    CustomFormInstrumenter(final File destDir, final List<String> nestedFormPathList, final List<String> ff, final ModuleBuildState s) {
+    CustomFormInstrumenter(final File destDir, final List<PrefixedPath> nestedFormPathList, final List<File> ff, final ModuleBuildState s) {
       super(destDir, nestedFormPathList);
       formFiles = ff;
       state = s;