diff --git a/cuda/Makefile b/cuda/Makefile
index 1a595bc7..b47e58ce 100755
--- a/cuda/Makefile
+++ b/cuda/Makefile
@@ -51,6 +51,7 @@ lib: objs ilib cudalib spgpulib
 	$(AR) $(LIBNAME) $(OBJS)
 	/bin/cp -p $(LIBNAME) $(LIBDIR)
 
+$(COBJS): spgpuinc
 
 objs: spgpuinc $(OBJS) iobjs cudaobjs spgpuobjs
 	/bin/cp -p *$(.mod) $(MODDIR)