diff --git a/src/hydro/Gadget2/hydro.h b/src/hydro/Gadget2/hydro.h
index 747c81a8e64c18a06b04160cfab326a3521c5901..91626749a89ede387547b6351dce59fa3569307a 100644
--- a/src/hydro/Gadget2/hydro.h
+++ b/src/hydro/Gadget2/hydro.h
@@ -293,7 +293,7 @@ __attribute__((always_inline)) INLINE static void hydro_reset_acceleration(
   p->force.h_dt = 0.0f;
 
   /* Reset maximal signal velocity */
-  p->force.v_sig = 0.0f;
+  p->force.v_sig = p->force.soundspeed;
 }
 
 /**
diff --git a/src/hydro/Minimal/hydro.h b/src/hydro/Minimal/hydro.h
index 8f216a550ae061d01a594ff23d57575e754f85dc..fd05b768b232c65dafedcf0940f74d9fb9bee9e3 100644
--- a/src/hydro/Minimal/hydro.h
+++ b/src/hydro/Minimal/hydro.h
@@ -279,7 +279,7 @@ __attribute__((always_inline)) INLINE static void hydro_reset_acceleration(
   /* Reset the time derivatives. */
   p->u_dt = 0.0f;
   p->force.h_dt = 0.0f;
-  p->force.v_sig = 0.0f;
+  p->force.v_sig = p->force.soundspeed;
 }
 
 /**
diff --git a/src/hydro/PressureEntropy/hydro.h b/src/hydro/PressureEntropy/hydro.h
index 4c4868cd3703e5ec5466d4878749a61284b19344..90190b223a976a3283a8e589d2fcf099735473e8 100644
--- a/src/hydro/PressureEntropy/hydro.h
+++ b/src/hydro/PressureEntropy/hydro.h
@@ -308,7 +308,7 @@ __attribute__((always_inline)) INLINE static void hydro_reset_acceleration(
   p->force.h_dt = 0.0f;
 
   /* Reset maximal signal velocity */
-  p->force.v_sig = 0.0f;
+  p->force.v_sig = p->force.soundspeed;
 }
 
 /**