diff --git a/src/Makefile.am b/src/Makefile.am
index e4d01722534faf817e4e68252699fc141857b9d8..c2a3a7755a188de6c907afe99e5ae1c4dfc5f3a8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -50,7 +50,7 @@ include_HEADERS = space.h runner.h queue.h task.h lock.h cell.h part.h const.h \
     chemistry.h chemistry_io.h chemistry_struct.h cosmology.h restart.h space_getsid.h utilities.h \
     mesh_gravity.h cbrt.h exp10.h velociraptor_interface.h swift_velociraptor_part.h outputlist.h \
     logger_io.h tracers_io.h tracers.h tracers_struct.h star_formation_io.h fof.h fof_struct.h fof_io.h \
-    star_formation_struct.h star_formation.h \
+    star_formation_struct.h star_formation.h star_formation_iact.h \
     star_formation_logger.h star_formation_logger_struct.h \
     pressure_floor.h pressure_floor_struct.h pressure_floor_iact.h \
     velociraptor_struct.h velociraptor_io.h random.h memuse.h mpiuse.h memuse_rnodes.h \
@@ -183,11 +183,11 @@ nobase_noinst_HEADERS = align.h approx_math.h atomic.h barrier.h cycle.h error.h
                  potential/isothermal/potential.h potential/disc_patch/potential.h \
                  potential/sine_wave/potential.h \
 		 star_formation/none/star_formation.h star_formation/none/star_formation_struct.h \
-		 star_formation/none/star_formation_io.h \
+		 star_formation/none/star_formation_io.h star_formation/none/star_formation_iact.h \
 		 star_formation/EAGLE/star_formation.h star_formation/EAGLE/star_formation_struct.h \
-		 star_formation/EAGLE/star_formation_io.h \
+		 star_formation/EAGLE/star_formation_io.h star_formation/EAGLE/star_formation_iact.h \
 		 star_formation/GEAR/star_formation.h star_formation/GEAR/star_formation_struct.h \
-		 star_formation/GEAR/star_formation_io.h \
+		 star_formation/GEAR/star_formation_io.h star_formation/GEAR/star_formation_iact.h \
                  star_formation/EAGLE/star_formation_logger.h star_formation/EAGLE/star_formation_logger_struct.h \
                  star_formation/GEAR/star_formation_logger.h star_formation/GEAR/star_formation_logger_struct.h \
                  star_formation/none/star_formation_logger.h star_formation/none/star_formation_logger_struct.h \