diff --git a/tools/aapt/Resource.cpp b/tools/aapt/Resource.cpp
index ab6dced..dd3ebdb 100644
--- a/tools/aapt/Resource.cpp
+++ b/tools/aapt/Resource.cpp
@@ -519,7 +519,7 @@
                         String8(parser.getElementName(&len)).string(), attr);
                 return ATTR_NOT_FOUND;
             }
-            if ((str=pool->stringAt(value.data, &len)) == NULL) {
+            if ((str = UnpackOptionalString(pool->stringAt(value.data), &len)) == NULL) {
                 fprintf(stderr, "%s:%d: Tag <%s> attribute %s has corrupt string value.\n",
                         path.string(), parser.getLineNumber(),
                         String8(parser.getElementName(&len)).string(), attr);
diff --git a/tools/aapt/ResourceTable.cpp b/tools/aapt/ResourceTable.cpp
index d02f44e..257e96b 100644
--- a/tools/aapt/ResourceTable.cpp
+++ b/tools/aapt/ResourceTable.cpp
@@ -3066,7 +3066,7 @@
         for (size_t ti=0; ti<N; ti++) {
             // Retrieve them in the same order as the type string block.
             size_t len;
-            String16 typeName(p->getTypeStrings().stringAt(ti, &len));
+            String16 typeName(UnpackOptionalString(p->getTypeStrings().stringAt(ti), &len));
             sp<Type> t = p->getTypes().valueFor(typeName);
             LOG_ALWAYS_FATAL_IF(t == NULL && typeName != String16("<empty>"),
                                 "Type name %s not found",
@@ -4169,7 +4169,7 @@
         const size_t N = strings->size();
         for (size_t i=0; i<N; i++) {
             size_t len;
-            mappings->add(String16(strings->stringAt(i, &len)), i);
+            mappings->add(String16(UnpackOptionalString(strings->stringAt(i), &len)), i);
         }
     }
     return err;
diff --git a/tools/aapt/StringPool.cpp b/tools/aapt/StringPool.cpp
index 37b61bf..6cacd32 100644
--- a/tools/aapt/StringPool.cpp
+++ b/tools/aapt/StringPool.cpp
@@ -52,9 +52,9 @@
     for (size_t i=0; i<N; i++) {
         size_t len;
         if (pool->isUTF8()) {
-            uniqueStrings.add(pool->string8At(i, &len));
+            uniqueStrings.add(UnpackOptionalString(pool->string8At(i), &len));
         } else {
-            uniqueStrings.add(pool->stringAt(i, &len));
+            uniqueStrings.add(UnpackOptionalString(pool->stringAt(i), &len));
         }
     }
 
@@ -66,8 +66,8 @@
 
     const size_t NS = pool->size();
     for (size_t s=0; s<NS; s++) {
-        String8 str = pool->string8ObjectAt(s);
-        printf("String #" ZD ": %s\n", (ZD_TYPE) s, str.string());
+        auto str = pool->string8ObjectAt(s);
+        printf("String #" ZD ": %s\n", (ZD_TYPE) s, (str.has_value() ? str->string() : ""));
     }
 }