diff --git a/code/makefile b/code/makefile
index 81ff884..0fa5c4c 100644
--- a/code/makefile
+++ b/code/makefile
@@ -33,6 +33,9 @@ x-edge-cold-bc-uPrime-hybrid : ${MODULES} ${OBJ}
 
 ${OBJ} : ${MODULES}
 
+m_terms.f90 : code_gen/code_gen.py code_gen/terms.input code_gen/resources/m_template.f90
+	cd code_gen && python code_gen.py > ../$@
+
 %.o: %.f90
 	${compiler} -c ${flags} $<