Index: include/llvm/Bitcode/BitstreamReader.h
===================================================================
--- include/llvm/Bitcode/BitstreamReader.h
+++ include/llvm/Bitcode/BitstreamReader.h
@@ -367,7 +367,7 @@
 
     // Round to word boundary.
     if (Limit & (sizeof(word_t) - 1))
-      Limit += sizeof(word_t) - Limit & (sizeof(word_t) - 1);
+      Limit += sizeof(word_t) - (Limit & (sizeof(word_t) - 1));
 
     // Only change size if the new one is lower.
     if (!Size || Size > Limit)