diff --git a/src/treelike.jl b/src/treelike.jl
index 3d83d448..9b3518d3 100644
--- a/src/treelike.jl
+++ b/src/treelike.jl
@@ -54,7 +54,7 @@ function loadparams!(m, xs)
   for (p, x) in zip(params(m), xs)
     size(p) == size(x) ||
       error("Expected param size $(size(p)), got $(size(x))")
-    copy!(data(p), data(x))
+    copyto!(data(p), data(x))
   end
 end