diff --git a/include/llvm/Bitcode/BitstreamWriter.h b/include/llvm/Bitcode/BitstreamWriter.h
index a837211875f..f40a0d1d259 100644
--- a/include/llvm/Bitcode/BitstreamWriter.h
+++ b/include/llvm/Bitcode/BitstreamWriter.h
@@ -381,7 +381,8 @@ private:
           BlobData = 0;
         } else {
           for (unsigned e = Vals.size(); RecordIdx != e; ++RecordIdx) {
-            assert(Vals[RecordIdx] < 256 && "Value too large to emit as blob");
+            assert(isUInt<8>(Vals[RecordIdx]) &&
+                   "Value too large to emit as blob");
             WriteByte((unsigned char)Vals[RecordIdx]);
           }
         }