diff --git a/src/Model/Results/River/River.py b/src/Model/Results/River/River.py
index fb3d194f..c3035888 100644
--- a/src/Model/Results/River/River.py
+++ b/src/Model/Results/River/River.py
@@ -210,6 +210,9 @@ class Profile(SQLSubModel):
                 sf = ">" + ''.join(itertools.repeat("f", len(values)))
                 len_values = len(values)
             elif key is "sl":
+                # HACK: Some dirty code to transforme list of list of
+                # tuple to list of values and ensure the values is
+                # float type...
                 values = flatten(
                     flatten(
                         map(lambda v: list(