diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationResolver.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationResolver.java
index 922c5506ccc..1f6437359da 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationResolver.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationResolver.java
@@ -366,7 +366,7 @@ public class DeclarationResolver {
             Collection<JetFile> files = trace.get(BindingContext.PACKAGE_TO_FILES, aPackage.getFqName());
 
             if (files == null) {
-                throw new IllegalStateException("declarations corresponding to " + aPackage + " are not found");
+                return Collections.emptyList(); // package can be defined out of Kotlin sources, e. g. in library or Java code
             }
 
             declarations = Collections2.transform(files, new Function<JetFile, PsiElement>() {