diff --git a/src/Makefile.am b/src/Makefile.am
index b0d58ebe495da2da713b961832ca59c8ff5c49e5..7e2ceeb6067bb831620472b50ccd51fdfd50b494 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -56,7 +56,7 @@ AM_SOURCES = space.c runner.c queue.c task.c cell.c engine.c \
 nobase_noinst_HEADERS = approx_math.h atomic.h cycle.h error.h inline.h kernel_hydro.h kernel_gravity.h \
 		 kernel_long_gravity.h vector.h runner_doiact.h runner_doiact_grav.h runner_doiact_fft.h \
                  units.h intrinsics.h minmax.h kick.h timestep.h drift.h adiabatic_index.h io_properties.h \
-		 equation_of_state.h
+		 equation_of_state.h \
 		 gravity.h gravity_io.h \
 		 gravity/Default/gravity.h gravity/Default/gravity_iact.h gravity/Default/gravity_io.h \
 		 gravity/Default/gravity_debug.h gravity/Default/gravity_part.h  \
diff --git a/src/hydro/Default/hydro.h b/src/hydro/Default/hydro.h
index ee0c61c81c977e655a938ba078fc0d775ce87179..7fe78f75fc00569ee8d34ea30a822bac394531e2 100644
--- a/src/hydro/Default/hydro.h
+++ b/src/hydro/Default/hydro.h
@@ -75,7 +75,7 @@ __attribute__((always_inline)) INLINE static float hydro_get_soundspeed(
  * @brief Modifies the thermal state of a particle to the imposed internal
  * energy
  *
- * This overrides the current state of the particle but does not change the
+ * This overrides the current state of the particle but does *not* change its
  * time-derivatives
  *
  * @param p The particle
@@ -90,7 +90,7 @@ __attribute__((always_inline)) INLINE static void hydro_set_internal_energy(
 /**
  * @brief Modifies the thermal state of a particle to the imposed entropy
  *
- * This overrides the current state of the particle but does not change the
+ * This overrides the current state of the particle but does *not* change its
  * time-derivatives
  *
  * @param p The particle