diff --git a/j2k/src/org/jetbrains/kotlin/j2k/Converter.kt b/j2k/src/org/jetbrains/kotlin/j2k/Converter.kt
index cf8eb23a761..eb6fad87623 100644
--- a/j2k/src/org/jetbrains/kotlin/j2k/Converter.kt
+++ b/j2k/src/org/jetbrains/kotlin/j2k/Converter.kt
@@ -451,6 +451,8 @@ class Converter private constructor(
     }
 
     fun shouldDeclareVariableType(variable: PsiVariable, type: Type, canChangeType: Boolean): Boolean {
+        assert(inConversionScope(variable))
+
         val initializer = variable.initializer
         if (initializer == null || initializer.isNullLiteral()) return true
         if (initializer.type is PsiPrimitiveType && type is PrimitiveType) {
diff --git a/j2k/src/org/jetbrains/kotlin/j2k/ExpressionConverter.kt b/j2k/src/org/jetbrains/kotlin/j2k/ExpressionConverter.kt
index cc3724834cd..cb7ffd7c64d 100644
--- a/j2k/src/org/jetbrains/kotlin/j2k/ExpressionConverter.kt
+++ b/j2k/src/org/jetbrains/kotlin/j2k/ExpressionConverter.kt
@@ -535,6 +535,8 @@ class DefaultExpressionConverter : JavaElementVisitor(), ExpressionConverter {
         fun isNullable(target: PsiVariable): Boolean {
             if (typeConverter.variableNullability(target).isNullable(codeConverter.settings)) return true
 
+            if (!converter.inConversionScope(target)) return false
+
             val canChangeType = when (target) {
                 is PsiLocalVariable -> codeConverter.canChangeType(target)
                 is PsiField -> target.hasModifierProperty(PsiModifier.PRIVATE)
diff --git a/j2k/testData/multiFile/KT11952/Foo.java b/j2k/testData/multiFile/KT11952/Foo.java
new file mode 100644
index 00000000000..c04acb0b640
--- /dev/null
+++ b/j2k/testData/multiFile/KT11952/Foo.java
@@ -0,0 +1,7 @@
+import test.Bar;
+
+public class Foo {
+    public static void foo() {
+        Object o = Bar.SET;
+    }
+}
\ No newline at end of file
diff --git a/j2k/testData/multiFile/KT11952/Foo.kt b/j2k/testData/multiFile/KT11952/Foo.kt
new file mode 100644
index 00000000000..5583cebf975
--- /dev/null
+++ b/j2k/testData/multiFile/KT11952/Foo.kt
@@ -0,0 +1,7 @@
+import test.Bar
+
+object Foo {
+    fun foo() {
+        val o = Bar.SET
+    }
+}
diff --git a/j2k/testData/multiFile/KT11952/external/Bar.java b/j2k/testData/multiFile/KT11952/external/Bar.java
new file mode 100644
index 00000000000..e052375a01b
--- /dev/null
+++ b/j2k/testData/multiFile/KT11952/external/Bar.java
@@ -0,0 +1,8 @@
+package test;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public interface Bar {
+    Set<String> SET = new HashSet<String>() { };
+}
\ No newline at end of file
diff --git a/j2k/testData/multiFile/KT11952/external/Bar.java.expected b/j2k/testData/multiFile/KT11952/external/Bar.java.expected
new file mode 100644
index 00000000000..981b983d771
--- /dev/null
+++ b/j2k/testData/multiFile/KT11952/external/Bar.java.expected
@@ -0,0 +1,8 @@
+package test;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public interface Bar {
+    Set<String> SET = new HashSet<String>() { };
+}
diff --git a/j2k/tests/org/jetbrains/kotlin/j2k/JavaToKotlinConverterMultiFileTestGenerated.java b/j2k/tests/org/jetbrains/kotlin/j2k/JavaToKotlinConverterMultiFileTestGenerated.java
index 1f8b77168bf..ed4c7e776b5 100644
--- a/j2k/tests/org/jetbrains/kotlin/j2k/JavaToKotlinConverterMultiFileTestGenerated.java
+++ b/j2k/tests/org/jetbrains/kotlin/j2k/JavaToKotlinConverterMultiFileTestGenerated.java
@@ -47,6 +47,12 @@ public class JavaToKotlinConverterMultiFileTestGenerated extends AbstractJavaToK
         doTest(fileName);
     }
 
+    @TestMetadata("KT11952")
+    public void testKT11952() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/multiFile/KT11952/");
+        doTest(fileName);
+    }
+
     @TestMetadata("ProtectedVisibility")
     public void testProtectedVisibility() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("j2k/testData/multiFile/ProtectedVisibility/");