diff --git a/build/Makefile b/build/Makefile
index a4077966..147d0f48 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -521,7 +521,8 @@ lib: $(OBJLIB)
 #
 # libexact: exact solution library
 #
-SRCLIBEXACT= plotlib_mock.f90 libutils.f90 exact_shock.f90 exact_shock_sr.f90 exact_sedov.f90 \
+SRCLIBEXACT= plotlib_mock.f90 libutils.f90 geometry.f90 exact_shock.f90 \
+	exact_shock_sr.f90 exact_sedov.f90 \
 	exact_polytrope.f90 exact_toystar1D.f90 exact_toystar2D.f90 exact_gresho.f90 \
 	exact_mhdshock.f90 exact_rhoh.f90 exact_densityprofiles.f90 exact_torus.f90 \
 	exact_ringspread.f90 cubicsolve.f90 exact_dustywaves.f90 exact_rochelobe.f90 \