diff --git a/src/surface.c b/src/surface.c
index 457c099..12da109 100644
--- a/src/surface.c
+++ b/src/surface.c
@@ -23,7 +23,7 @@ void mobius(float *d_surface, int i, int j, int grid_size)
 void toro(float *d_surface, int i, int j, int grid_size)
 {
     float u = (2*M_PI) * ((float)i/(grid_size) );
-    float v = (2*WIDTH) * ((float)j );
+    float v = (1*WIDTH) * ((float)j );
 
     d_surface[0] = (1 + 0.5*cos(v))*cos(u);
     d_surface[1] = (1 + 0.5*cos(v)) * sin(u);