diff --git a/config/astaroth.conf b/config/astaroth.conf
index 41b7e51..7235811 100644
--- a/config/astaroth.conf
+++ b/config/astaroth.conf
@@ -49,6 +49,12 @@ AC_gamma = 0.5
 AC_lnT0 = 1.2
 AC_lnrho0 = 1.3
 
+// Sink Particle
+AC_sink_pos_x = 3.14
+AC_sink_pos_y = 0.0
+AC_sink_pos_z = 0.0
+AC_M_sink = 1.0
+
 /*
  * =============================================================================
  * Initial conditions