diff --git a/site_ansto/Makefile b/site_ansto/Makefile
index 368b541d..a4d98ec4 100644
--- a/site_ansto/Makefile
+++ b/site_ansto/Makefile
@@ -172,10 +172,10 @@ libansto.a: $(OBJ)
 	ranlib libansto.a
 
 libhardsup:
-	$(MAKE) -C hardsup/ INC_TCL8="$(INC_TCL8)"
+	$(MAKE) -C hardsup/ INC_TCL8="$(INC_TCL8)" "CC=${CC}"
 
 libsics:
-	$(MAKE) -C .. -f site_ansto/Makefile_SICS INC_TCL8="$(INC_TCL8)" INC_HDF5="$(INC_HDF5)" all
+	$(MAKE) -C .. -f site_ansto/Makefile_SICS INC_TCL8="$(INC_TCL8)" INC_HDF5="$(INC_HDF5)" "CC=${CC}" all
 
 anstohm.o : anstohm.cpp
 	$(CXX) -c anstohm.cpp $(CFLAGS) $(CXXFLAGS) -Wno-all