diff --git a/src/hydro/AnarchyPU/hydro_io.h b/src/hydro/AnarchyPU/hydro_io.h
index 99fea6a9feb2722da3c82482d4f5e79330e5c7e6..b2a411cf408a2067ea5490869be004f9fd26954d 100644
--- a/src/hydro/AnarchyPU/hydro_io.h
+++ b/src/hydro/AnarchyPU/hydro_io.h
@@ -207,7 +207,7 @@ INLINE static void hydro_write_flavour(hid_t h_grpsph) {
   /* Nothing in this minimal model... */
   io_write_attribute_s(h_grpsph, "Thermal Conductivity Model", "No treatment");
   io_write_attribute_s(h_grpsph, "Viscosity Model",
-                       "Minimal treatment as in Monaghan (1992)");
+                       "Simplified version of Cullen & Denhen (2011)");
 
   /* Time integration properties */
   io_write_attribute_f(h_grpsph, "Maximal Delta u change over dt",