diff --git a/src/equations/compressible_navier_stokes.jl b/src/equations/compressible_navier_stokes.jl
index b0258e4b98a..af7ee0a1e24 100644
--- a/src/equations/compressible_navier_stokes.jl
+++ b/src/equations/compressible_navier_stokes.jl
@@ -75,4 +75,4 @@ struct GradientVariablesEntropy end
 """
 dynamic_viscosity(u, equations) = dynamic_viscosity(u, equations.mu, equations)
 dynamic_viscosity(u, mu::Real, equations) = mu
-dynamic_viscosity(u, mu::T, equations) where {T} = mu(u, equations)
\ No newline at end of file
+dynamic_viscosity(u, mu::T, equations) where {T} = mu(u, equations)