diff --git a/java/java-impl/src/com/intellij/slicer/DfaBasedFilter.java b/java/java-impl/src/com/intellij/slicer/DfaBasedFilter.java
index 1bd4a38a84d7..e8ecd1a78f14 100644
--- a/java/java-impl/src/com/intellij/slicer/DfaBasedFilter.java
+++ b/java/java-impl/src/com/intellij/slicer/DfaBasedFilter.java
@@ -56,7 +56,8 @@ final class DfaBasedFilter {
       DfConstantType<?> dfConstantType = (DfConstantType<?>)myDfType;
       Object constValue = dfConstantType.getValue();
       if (!(constValue instanceof PsiElement)) {
-        Object value = TypeConversionUtil.computeCastTo(((PsiLiteralValue)element).getValue(), dfConstantType.getPsiType());
+        Object literalValue = ((PsiLiteralValue)element).getValue();
+        Object value = constValue == null ? literalValue : TypeConversionUtil.computeCastTo(literalValue, dfConstantType.getPsiType());
         return Objects.equals(value, constValue);
       }
     }