diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetFlowInformationProvider.java b/compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetFlowInformationProvider.java
index 16382f46f48..4ae33ffda35 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetFlowInformationProvider.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/cfg/JetFlowInformationProvider.java
@@ -56,7 +56,7 @@ public class JetFlowInformationProvider {
     private final JetElement subroutine;
     private final Pseudocode pseudocode;
     private final PseudocodeVariablesData pseudocodeVariablesData;
-    private BindingTrace trace;
+    private final BindingTrace trace;
 
     public JetFlowInformationProvider(
             @NotNull JetElement declaration,