diff --git a/tinker-build/tinker-patch-lib/src/main/java/com/tencent/tinker/build/decoder/DexDiffDecoder.java b/tinker-build/tinker-patch-lib/src/main/java/com/tencent/tinker/build/decoder/DexDiffDecoder.java
index 40b7f8fd..d6f18559 100644
--- a/tinker-build/tinker-patch-lib/src/main/java/com/tencent/tinker/build/decoder/DexDiffDecoder.java
+++ b/tinker-build/tinker-patch-lib/src/main/java/com/tencent/tinker/build/decoder/DexDiffDecoder.java
@@ -187,6 +187,17 @@ public boolean patch(final File oldFile, final File newFile) throws IOException,
         } catch (Exception e) {
             e.printStackTrace();
         }
+        
+        // If is protechted app mode.
+        // Just collect current old dex file and corresponding new dex file for further processing.
+        if (config.mIsProtectedApp) {
+            hasDexChanged = true;
+            oldAndNewDexFilePairList.add(new AbstractMap.SimpleEntry<>(oldFile, newFile));
+            if (oldFile != null && oldFile.exists() && oldFile.length() > 0) {
+                oldDexFiles.add(oldFile);
+            }
+            return true;
+        }     
 
         // If corresponding new dex was completely deleted, just return false.
         // don't process 0 length dex