diff --git a/format.h b/format.h
index 0524c423..2fff9675 100644
--- a/format.h
+++ b/format.h
@@ -80,7 +80,7 @@
        (FMT_GCC_VERSION >= 403 && __cplusplus >= 201103) || _MSC_VER >= 1600)
 // Don't use rvalue references when compiling with clang and an old libstdc++
 // as the latter doesn't provide std::move.
-# ifdef FMT_GNUC_LIBSTD_VERSION <= 402
+# if FMT_GNUC_LIBSTD_VERSION <= 402
 #  define FMT_USE_RVALUE_REFERENCES 0
 # endif
 #endif
@@ -165,6 +165,8 @@ class Array {
       other.ptr_ = 0;
     }
   }
+
+  // TODO: move assignment operator
 #endif
 
   // Returns the size of this array.