diff --git a/src/cooling/Compton/cooling.h b/src/cooling/Compton/cooling.h
index d67006b9cdb57cb1716ac6a2b282182013cc2b02..da9225fe02fb6805f795938f86afd75ebdbef125 100644
--- a/src/cooling/Compton/cooling.h
+++ b/src/cooling/Compton/cooling.h
@@ -41,7 +41,7 @@
  *
  * @param T The temperature of the gas [K].
  * @param H_mass_fraction The hydrogen mass fraction of the gas.
- * @param T_trans The temperature of the transition from HII to HI [K].
+ * @param T_transition The temperature of the transition from HII to HI [K].
  */
 __attribute__((always_inline, const)) INLINE static double
 mean_molecular_weight(const double T, const double H_mass_fraction,
@@ -59,7 +59,7 @@ mean_molecular_weight(const double T, const double H_mass_fraction,
  *
  * @param u_cgs The internal energy per unit mass of the gas [erg * g^-1].
  * @param H_mass_fraction The hydrogen mass fraction of the gas.
- * @param T_trans The temperature of the transition from HII to HI [K].
+ * @param T_transition The temperature of the transition from HII to HI [K].
  * @param m_H_cgs The mass of the Hydorgen atom [g].
  * @param k_B_cgs The Boltzmann constant in cgs units [erg * K^-1]
  * @return The temperature of the gas [K]
diff --git a/src/space.c b/src/space.c
index 2afc493a764b40e9c6d1d53b481049394cbcd209..3a25e91b67e25663322b6ecb50560785160918c6 100644
--- a/src/space.c
+++ b/src/space.c
@@ -3158,10 +3158,12 @@ void space_replicate(struct space *s, int replicate, int verbose) {
  *
  * @param s The #space to create the particles in.
  * @param cosmo The current #cosmology model.
+ * @param periodic Are we using periodic boundary conditions?
+ * @param dim The size of the box (for periodic wrapping).
  * @param verbose Are we talkative?
  */
 void space_generate_gas(struct space *s, const struct cosmology *cosmo,
-                        int periodic, double dim[3], int verbose) {
+                        int periodic, const double dim[3], int verbose) {
 
   /* Check that this is a sensible ting to do */
   if (!s->hydro)
diff --git a/src/space.h b/src/space.h
index 52bc38b082c165b4a001a53b15f0d6c2cb9e2c13..1ae80d437eda3aeb09e5c8b48cdaa5ba17044074 100644
--- a/src/space.h
+++ b/src/space.h
@@ -268,7 +268,7 @@ void space_check_top_multipoles_drift_point(struct space *s,
 void space_check_timesteps(struct space *s);
 void space_replicate(struct space *s, int replicate, int verbose);
 void space_generate_gas(struct space *s, const struct cosmology *cosmo,
-                        int periodic, double dim[3], int verbose);
+                        int periodic, const double dim[3], int verbose);
 void space_check_cosmology(struct space *s, const struct cosmology *cosmo,
                            int rank);
 void space_reset_task_counters(struct space *s);