diff --git a/src/lib/diff/tree-mutator.hpp b/src/lib/diff/tree-mutator.hpp
index f2638ba1f..1c90ddb9f 100644
--- a/src/lib/diff/tree-mutator.hpp
+++ b/src/lib/diff/tree-mutator.hpp
@@ -106,7 +106,7 @@ namespace lib {
       template<size_t maxSiz>
       PlantingHandle (InPlaceBuffer<BA, maxSiz>& targetBuffer)
         : buffer_(&targetBuffer)
-        , maxSiz_(maxSiz_)
+        , maxSiz_(maxSiz)
         { }