diff --git a/Makefile b/Makefile
index 4407ae7..ad7e284 100644
--- a/Makefile
+++ b/Makefile
@@ -114,6 +114,11 @@ $(LIBGRAY).so: $(MODULES) | $(LIBDIR)
 $(LIBGRAY).a($(MODULES)): | $(LIBDIR)
 $(LIBGRAY).a: $(LIBGRAY).a($(MODULES))
 
+# GRAY static library when compiling from JETTO
+-include ../include.mk
+$(JLIBDIR)/libgray.a: $(LIBGRAY).a
+	install -Dm755 '$<' '$@'
+
 # All documentation
 docs: $(SHAREDIR)/gray.1 $(SHAREDIR)/doc