diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java
index 9e91fbf8..ccf2cdb4 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/Androlib.java
@@ -652,7 +652,8 @@ public class Androlib {
 
         // loop through unknown files
         for (Map.Entry<String,String> unknownFileInfo : files.entrySet()) {
-            String cleanedPath = BrutIO.sanitizeUnknownFile(unknownFileDir, unknownFileInfo.getKey());
+            String normalizedPath = BrutIO.normalizePath(unknownFileInfo.getKey());
+            String cleanedPath = BrutIO.sanitizeUnknownFile(unknownFileDir, normalizedPath);
             File inputFile = new File(unknownFileDir, cleanedPath);
             if (inputFile.isDirectory()) {
                 continue;
@@ -683,15 +684,16 @@ public class Androlib {
         File assetFileDir = new File(appDir, ASSET_DIRNAME);
 
         for (String asset : files) {
-            String cleanedPath = BrutIO.sanitizeUnknownFile(assetFileDir, asset);
+            String normalizedPath = BrutIO.normalizePath(asset);
+            String cleanedPath = BrutIO.sanitizeUnknownFile(assetFileDir, normalizedPath);
 
             File inputFile = new File(appDir, cleanedPath);
             if (inputFile.isDirectory()) {
                 continue;
             }
 
-            LOGGER.fine(String.format("Copying uncompressed asset: %s", asset));
-            ZipEntry newEntry = getStoredZipEntry(cleanedPath, inputFile);
+            LOGGER.fine(String.format("Copying uncompressed asset: %s", normalizedPath));
+            ZipEntry newEntry = getStoredZipEntry(normalizedPath, inputFile);
             outputFile.putNextEntry(newEntry);
             BrutIO.copy(inputFile, outputFile);
             outputFile.closeEntry();
diff --git a/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/data/ResUnknownFiles.java b/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/data/ResUnknownFiles.java
index 595c4343..a73362aa 100644
--- a/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/data/ResUnknownFiles.java
+++ b/brut.apktool/apktool-lib/src/main/java/brut/androlib/res/data/ResUnknownFiles.java
@@ -16,6 +16,7 @@
  */
 package brut.androlib.res.data;
 
+import brut.util.BrutIO;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -27,7 +28,7 @@ public class ResUnknownFiles {
     private final Map<String, String> mUnknownFiles = new LinkedHashMap<>();
 
     public void addUnknownFileInfo(String file, String value) {
-        mUnknownFiles.put(file, value);
+        mUnknownFiles.put(BrutIO.normalizePath(file), value);
     }
 
     public Map<String, String> getUnknownFiles() {