diff --git a/source/maths/mtx_multiply.c b/source/maths/mtx_multiply.c
index 6f5e1be..8d69cb4 100644
--- a/source/maths/mtx_multiply.c
+++ b/source/maths/mtx_multiply.c
@@ -2,7 +2,7 @@
 
 void Mtx_Multiply(C3D_Mtx* restrict out, const C3D_Mtx* a, const C3D_Mtx* b)
 {
-	// http://www.wolframalpha.com/input/?i={{a,b,c,d},{e,f,g,h},{i,j,k,l},{m,n,o,p}}{{α,β,γ,δ},{ε,θ,ι,κ},{λ,μ,ν,ξ},{ο,π,�,σ}}
+	// http://www.wolframalpha.com/input/?i={{a,b,c,d},{e,f,g,h},{i,j,k,l},{m,n,o,p}}{{α,β,γ,δ},{ε,θ,ι,κ},{λ,μ,ν,ξ},{ο,π,ρ,σ}}
 	int i, j;
 	for (j = 0; j < 4; ++j)
 		for (i = 0; i < 4; ++i)