diff --git a/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/DexBackedMethod.java b/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/DexBackedMethod.java
index f26b7e12..eccb9218 100644
--- a/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/DexBackedMethod.java
+++ b/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/DexBackedMethod.java
@@ -32,7 +32,7 @@
 package org.jf.dexlib2.dexbacked;
 
 import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Iterators;
+import com.google.common.collect.ImmutableSet;
 import org.jf.dexlib2.base.reference.BaseMethodReference;
 import org.jf.dexlib2.dexbacked.raw.MethodIdItem;
 import org.jf.dexlib2.dexbacked.raw.ProtoIdItem;
@@ -152,7 +152,7 @@ public class DexBackedMethod extends BaseMethodReference implements Method {
         if (methodImpl != null) {
             return methodImpl.getParameterNames(null);
         }
-        return Iterators.emptyIterator();
+        return ImmutableSet.<String>of().iterator();
     }
 
     @Nonnull
diff --git a/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/util/DebugInfo.java b/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/util/DebugInfo.java
index 6759820e..db27d923 100644
--- a/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/util/DebugInfo.java
+++ b/brut.apktool.smali/dexlib2/src/main/java/org/jf/dexlib2/dexbacked/util/DebugInfo.java
@@ -31,12 +31,13 @@
 
 package org.jf.dexlib2.dexbacked.util;
 
+import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterators;
 import org.jf.dexlib2.AccessFlags;
 import org.jf.dexlib2.DebugItemType;
+import org.jf.dexlib2.dexbacked.DexBackedDexFile;
 import org.jf.dexlib2.dexbacked.DexBackedMethod;
 import org.jf.dexlib2.dexbacked.DexBackedMethodImplementation;
-import org.jf.dexlib2.dexbacked.DexBackedDexFile;
 import org.jf.dexlib2.dexbacked.DexReader;
 import org.jf.dexlib2.iface.MethodParameter;
 import org.jf.dexlib2.iface.debug.DebugItem;
@@ -72,7 +73,7 @@ public abstract class DebugInfo implements Iterable<DebugItem> {
         private EmptyDebugInfo() {}
         @Nonnull @Override public Iterator<DebugItem> iterator() { return Iterators.emptyIterator(); }
         @Nonnull @Override public Iterator<String> getParameterNames(@Nullable DexReader reader) {
-            return Iterators.emptyIterator();
+            return ImmutableSet.<String>of().iterator();
         }
     }