diff --git a/julia/deps/build.jl b/julia/deps/build.jl
index a87343d9dab5..a79d2a062c18 100644
--- a/julia/deps/build.jl
+++ b/julia/deps/build.jl
@@ -54,7 +54,7 @@ if Sys.isunix()
   nvcc_path = Sys.which("nvcc")
   if nvcc_path ≢ nothing
     @info "Found nvcc: $nvcc_path"
-    push!(CUDAPATHS, replace(nvcc_path, "bin/nvcc", "lib64"))
+    push!(CUDAPATHS, replace(nvcc_path, "bin/nvcc" => "lib64"))
   end
 end
 
diff --git a/julia/src/metric.jl b/julia/src/metric.jl
index f1cdc68d947f..2ae7fc85144b 100644
--- a/julia/src/metric.jl
+++ b/julia/src/metric.jl
@@ -260,7 +260,7 @@ end
 
 function get(metric::MSE)
   # Delay copy until last possible moment
-  mse_sum = mapreduce(nda->copy(nda)[1], +, 0.0, metric.mse_sum)
+  mse_sum = mapreduce(nda->copy(nda)[1], +, metric.mse_sum; init = zero(MX_float))
   [(:MSE, mse_sum / metric.n_sample)]
 end