diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/ScriptCodegen.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/ScriptCodegen.java
index a00e37ba4a4..1f068b6f49f 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/ScriptCodegen.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/ScriptCodegen.java
@@ -152,7 +152,7 @@ public class ScriptCodegen extends MemberCodegen<KtScript> {
                 iv.invokespecial("java/lang/Object", "<init>", "()V", false);
             }
             else {
-                // TODO: check if it is correct way to find a promary constructor
+                // TODO: check if it is correct way to find a primary constructor
                 Collection<ClassConstructorDescriptor> ctorDescriptors = superclass.getConstructors();
                 assert ctorDescriptors.size() == 1;
                 ConstructorDescriptor ctorDesc = ctorDescriptors.iterator().next();
@@ -160,6 +160,8 @@ public class ScriptCodegen extends MemberCodegen<KtScript> {
 
                 iv.load(0, classType);
 
+                int valueParamStart = context.getEarlierScripts().size() + 1;
+
                 List<ValueParameterDescriptor> valueParameters = scriptDescriptor.getUnsubstitutedPrimaryConstructor().getValueParameters();
                 for (ValueParameterDescriptor superclassParam: ctorDesc.getValueParameters()) {
                     ValueParameterDescriptor valueParam = null;
@@ -170,7 +172,7 @@ public class ScriptCodegen extends MemberCodegen<KtScript> {
                         }
                     }
                     assert valueParam != null;
-                    iv.load(valueParam.getIndex() + 1, typeMapper.mapType(valueParam.getType()));
+                    iv.load(valueParam.getIndex() + valueParamStart, typeMapper.mapType(valueParam.getType()));
                 }
 
                 CallableMethod ctorMethod = typeMapper.mapToCallableMethod(ctorDesc, false);