diff --git a/libs/androidfw/ResourceTypes.cpp b/libs/androidfw/ResourceTypes.cpp
index 15cb684ee08e9..c3dfb89180de6 100644
--- a/libs/androidfw/ResourceTypes.cpp
+++ b/libs/androidfw/ResourceTypes.cpp
@@ -562,7 +562,7 @@ status_t ResStringPool::setTo(const void* data, size_t size, bool copyData)
 
         if ((mHeader->flags&ResStringPool_header::UTF8_FLAG &&
                 ((uint8_t*)mStrings)[mStringPoolSize-1] != 0) ||
-                (!mHeader->flags&ResStringPool_header::UTF8_FLAG &&
+                (!(mHeader->flags&ResStringPool_header::UTF8_FLAG) &&
                 ((uint16_t*)mStrings)[mStringPoolSize-1] != 0)) {
             ALOGW("Bad string block: last string is not 0-terminated\n");
             return (mError=BAD_TYPE);