1 files changed, 1 insertions, 1 deletions
diff --git a/intern/cycles/util/util_math_intersect.h b/intern/cycles/util/util_math_intersect.h
index fa3a541eea9..fd0c9124345 100644
--- a/intern/cycles/util/util_math_intersect.h
+++ b/intern/cycles/util/util_math_intersect.h
@@ -40,7 +40,7 @@ ccl_device bool ray_sphere_intersect(float3 ray_P,
       /* Ray  points away from sphere. */
       return false;
     }
-    const float dsq = tsq - tp * tp; /* pythagoras */
+    const float dsq = tsq - tp * tp; /* Pythagoras. */
     if (dsq > radiussq) {
       /* Closest point on ray outside sphere. */
       return false;