diff --git a/src/Makefile b/src/Makefile
index 1e9128f..eb9edaf 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,8 +20,8 @@ IRIX:
 	@ ${F77} -O2 -mips3 -nocpp -OPT:Olimit=1500 -w -rpath ${CCP4_LIB} -o oasis4-0 oasis4-0.f -L${CCP4_LIB}/src -lccp4f -lccp4c -lmmdb -lC -lm -L/usr/lib32 -lblas
 	@ ${F77} -O2 -mips3 -nocpp -OPT:Olimit=1500 -w -rpath ${CCP4_LIB} -o fnp2fp fnp2fp.f -L${CCP4_LIB}/src -lccp4f -lccp4c -lmmdb -lC -lm -L/usr/lib32 -lblas
 Linux:
-	@ ${F77} -O -w -fno-second-underscore -fno-globals -fno-automatic -o oasis4-0 oasis4-0.f -L${CCP4_LIB} -lccp4f -lccp4c -lmmdb -lstdc++ -lg2c -lm -L${CCP4_LIB}
-	@ ${F77} -O -w -fno-second-underscore -fno-globals -fno-automatic -o fnp2fp fnp2fp.f -L${CCP4_LIB} -lccp4f -lccp4c -lmmdb -lstdc++ -lg2c -lm -L${CCP4_LIB}
+	${F77} $(CFLAGS) $(LDFLAGS) -o oasis oasis4-0.f -L${CCP4_LIB} -lccp4f -lccp4c -lmmdb -lstdc++ -lm -L${CCP4_LIB}
+	${F77} $(CFLAGS) $(LDFLAGS) -o fnp2fp fnp2fp.f -L${CCP4_LIB} -lccp4f -lccp4c -lmmdb -lstdc++ -lm -L${CCP4_LIB}
 Darwin:
 	@ ${F77} -O2 -fno-second-underscore -o fnp2fp fnp2fp.f   -L${CCP4_LIB} -lccp4f -lccp4c -lmmdb -lstdc++ -lgcc_s.10.5 -lSystem -lm
 	@ ${F77} -O2 -fno-second-underscore -o oasis4-0 oasis4-0.f   -L${CCP4_LIB} -lccp4f -lccp4c -lmmdb -lstdc++ -lgcc_s.10.5 -lSystem -lm