diff --git a/src/auxiliary/mpi.jl b/src/auxiliary/mpi.jl
index 434f5dbd753..4eddf8cf025 100644
--- a/src/auxiliary/mpi.jl
+++ b/src/auxiliary/mpi.jl
@@ -134,4 +134,5 @@ ode_unstable_check(dt, u, semi, t) = isnan(dt)
 function reduce_vector_plus(x, y)
     x .+ y
 end
-MPI.@Op(reduce_vector_plus, SVector)
+MPI.@Op(reduce_vector_plus, SVector{4, Float64})
+MPI.@Op(reduce_vector_plus, SVector{5, Float64})