diff --git a/tools/aapt/Bundle.h b/tools/aapt/Bundle.h
index 77df6e5..74d269d 100644
--- a/tools/aapt/Bundle.h
+++ b/tools/aapt/Bundle.h
@@ -39,7 +39,7 @@
           mRequireLocalization(false), mPseudolocalize(false),
           mValues(false),
           mCompressionMethod(0), mOutputAPKFile(NULL),
-          mAssetSourceDir(NULL), mProguardFile(NULL),
+          mAutoAddOverlay(false), mAssetSourceDir(NULL), mProguardFile(NULL),
           mAndroidManifestFile(NULL), mPublicOutputFile(NULL),
           mRClassDir(NULL), mResourceIntermediatesDir(NULL),
           mMinSdkVersion(NULL), mTargetSdkVersion(NULL), mMaxSdkVersion(NULL),
@@ -84,6 +84,8 @@
     void setJunkPath(bool val) { mJunkPath = val; }
     const char* getOutputAPKFile() const { return mOutputAPKFile; }
     void setOutputAPKFile(const char* val) { mOutputAPKFile = val; }
+    bool getAutoAddOverlay() { return mAutoAddOverlay; }
+    void setAutoAddOverlay(bool val) { mAutoAddOverlay = val; }
 
     /*
      * Input options.
@@ -167,6 +169,7 @@
     int         mCompressionMethod;
     bool        mJunkPath;
     const char* mOutputAPKFile;
+    bool        mAutoAddOverlay;
     const char* mAssetSourceDir;
     const char* mProguardFile;
     const char* mAndroidManifestFile;
diff --git a/tools/aapt/Main.cpp b/tools/aapt/Main.cpp
index 0b51ad8..1a4ec7a 100644
--- a/tools/aapt/Main.cpp
+++ b/tools/aapt/Main.cpp
@@ -60,6 +60,7 @@
         "        [--min-sdk-version VAL] [--target-sdk-version VAL] \\\n"
         "        [--max-sdk-version VAL] [--app-version VAL] \\\n"
         "        [--app-version-name TEXT] [--custom-package VAL] \\\n"
+        "        [--auto-add-overlay] \\\n"
         "        [-I base-package [-I base-package ...]] \\\n"
         "        [-A asset-source-dir]  [-G class-list-file] [-P public-definitions-file] \\\n"
         "        [-S resource-sources [-S resource-sources ...]] "
@@ -134,7 +135,9 @@
         "   --version-name\n"
         "       inserts android:versionName in to manifest.\n"
         "   --custom-package\n"
-        "       generates R.java into a different package.\n");
+        "       generates R.java into a different package.\n"
+        "   --auto-add-overlay\n"
+        "       Automatically add resources that are only in overlays.\n");
 }
 
 /*
@@ -429,6 +432,8 @@
                         goto bail;
                     }
                     bundle.setCustomPackage(argv[0]);
+                } else if (strcmp(cp, "-auto-add-overlay") == 0) {
+                    bundle.setAutoAddOverlay(true);
                 } else {
                     fprintf(stderr, "ERROR: Unknown option '-%s'\n", cp);
                     wantUsage = true;
diff --git a/tools/aapt/ResourceTable.cpp b/tools/aapt/ResourceTable.cpp
index 19b9b01..b3cf7ea 100644
--- a/tools/aapt/ResourceTable.cpp
+++ b/tools/aapt/ResourceTable.cpp
@@ -1587,7 +1587,7 @@
                sourcePos.file.striing(), sourcePos.line, String8(type).string());
     }
 #endif
-    if (overlay && !hasBagOrEntry(package, type, name)) {
+    if (overlay && !mBundle->getAutoAddOverlay() && !hasBagOrEntry(package, type, name)) {
         bool canAdd = false;
         sp<Package> p = mPackages.valueFor(package);
         if (p != NULL) {
@@ -3275,12 +3275,13 @@
                                                        const SourcePos& sourcePos,
                                                        const ResTable_config* config,
                                                        bool doSetIndex,
-                                                       bool overlay)
+                                                       bool overlay,
+                                                       bool autoAddOverlay)
 {
     int pos = -1;
     sp<ConfigList> c = mConfigs.valueFor(entry);
     if (c == NULL) {
-        if (overlay == true && mCanAddEntries.indexOf(entry) < 0) {
+        if (overlay && !autoAddOverlay && mCanAddEntries.indexOf(entry) < 0) {
             sourcePos.error("Resource at %s appears in overlay but not"
                             " in the base package; use <add-resource> to add.\n",
                             String8(entry).string());
@@ -3592,7 +3593,7 @@
     if (t == NULL) {
         return NULL;
     }
-    return t->getEntry(name, sourcePos, config, doSetIndex, overlay);
+    return t->getEntry(name, sourcePos, config, doSetIndex, overlay, mBundle->getAutoAddOverlay());
 }
 
 sp<const ResourceTable::Entry> ResourceTable::getEntry(uint32_t resID,
diff --git a/tools/aapt/ResourceTable.h b/tools/aapt/ResourceTable.h
index caa01b3..3fff71c 100644
--- a/tools/aapt/ResourceTable.h
+++ b/tools/aapt/ResourceTable.h
@@ -424,7 +424,8 @@
                            const SourcePos& pos,
                            const ResTable_config* config = NULL,
                            bool doSetIndex = false,
-                           bool overlay = false);
+                           bool overlay = false,
+                           bool autoAddOverlay = false);
 
         const SourcePos& getFirstPublicSourcePos() const { return *mFirstPublicSourcePos; }