diff --git a/src/ConservationLaws/euler_navierstokes.jl b/src/ConservationLaws/euler_navierstokes.jl
index c0b7886e..17ac85d5 100644
--- a/src/ConservationLaws/euler_navierstokes.jl
+++ b/src/ConservationLaws/euler_navierstokes.jl
@@ -284,15 +284,17 @@ Domain should be [0,2π]³.
 """
 struct TaylorGreenVortex <: AbstractGridFunction{3} 
     γ::Float64
+    Ma::Float64
     N_c::Int
-    function TaylorGreenVortex(conservation_law::EulerEquations{3})
-        return new(conservation_law.γ,5)
+    function TaylorGreenVortex(conservation_law::EulerEquations{3},
+        Ma::Float64=0.1)
+        return new(conservation_law.γ,Ma,5)
     end
 end
 
 @inline function evaluate(f::TaylorGreenVortex, 
     x::NTuple{3,Float64}, t::Float64=0.0) 
-    p = (100/f.γ) + 0.0625*(2*cos(2*x[1]) + 2*cos(2*x[2]) +
+    p = (1/(f.Ma^2*f.γ)) + 0.0625*(2*cos(2*x[1]) + 2*cos(2*x[2]) +
         cos(2*x[1])*cos(2*x[3]) + cos(2*x[2])*cos(2*x[3]))
     u = sin(x[1])*cos(x[2])*cos(x[3])
     v = -cos(x[1])*sin(x[2])*cos(x[3])