diff --git a/include/fastfields/api/distance.h b/include/fastfields/api/distance.h
index a4e51cc..072d439 100644
--- a/include/fastfields/api/distance.h
+++ b/include/fastfields/api/distance.h
@@ -150,13 +150,18 @@ void dt_spline_gaussnewton(
 /**
  * @brief Compute the distance from a set of points to a triangular mesh.
  *
- * @param dist              Output tensor for squared distances (*B,)
+ * @param dist              Output tensor for distances (*B,). NOT squared --
+ *                          unlike the spline ops above, this is the plain
+ *                          Euclidean point-to-triangle distance, negative
+ *                          inside the surface when `_signed`.
  * @param nearest_vertex    Output tensor for index of nearest vertex (*B,)
  * @param loc               Input tensor for ND location of each point (*B, D)
  * @param vertices          Input tensor for mesh vertices (N, D)
  * @param faces             Input tensor for mesh faces (M, D)
- * @param _signed           Whether to compute signed distances (inside negative)
- * @param naive             Whether to use the naive algorithm (no acceleration structure)
+ * @param _signed           Whether to compute signed distances (negative
+ *                          inside the surface)
+ * @param naive             Whether to use the naive algorithm (no
+ *                          acceleration structure)
  * @param stream            Cuda stream on which to operate
  */
 void dt_mesh(