diff --git a/src/schemes/boundary/open_boundary/method_of_characteristics.jl b/src/schemes/boundary/open_boundary/method_of_characteristics.jl
index 7fe5f0d39..5135029d6 100644
--- a/src/schemes/boundary/open_boundary/method_of_characteristics.jl
+++ b/src/schemes/boundary/open_boundary/method_of_characteristics.jl
@@ -108,9 +108,9 @@ function evaluate_characteristics!(system, v, u, v_ode, u_ode, semi, t)
                 characteristics[2, particle] = avg_J2 / counter
                 characteristics[3, particle] = avg_J3 / counter
             else
-                characteristics[1, particle] = 0.0
-                characteristics[2, particle] = 0.0
-                characteristics[3, particle] = 0.0
+                characteristics[1, particle] = 0
+                characteristics[2, particle] = 0
+                characteristics[3, particle] = 0
             end
         else
             characteristics[1, particle] /= volume[particle]