diff --git a/makefile b/makefile
index ede2c3a..75bc934 100644
--- a/makefile
+++ b/makefile
@@ -174,13 +174,13 @@ pre_gen:
 	rm mpi.c
 
 zipup:
-	rm -rf ../libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH) \
-		&& rm -f ../ltm-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH).zip ../ltm-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH).tar.bz2
-	git archive HEAD --prefix=libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)/ > ../libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH).tar
-	cd .. ; tar xf libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH).tar
-	MAKE=${MAKE} ${MAKE} -C ../libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH) clean manual poster docs
-	tar -c ../libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)/* | xz -9 > ../ltm-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH).tar.xz
-	cd .. ; zip -9r ltm-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH).zip libtommath-$(VER_MAJOR).$(VER_MINOR).$(VER_PATCH)
+	rm -rf ../libtommath-$(VERSION) \
+		&& rm -f ../ltm-$(VERSION).zip ../ltm-$(VERSION).tar.bz2
+	git archive HEAD --prefix=libtommath-$(VERSION)/ > ../libtommath-$(VERSION).tar
+	cd .. ; tar xf libtommath-$(VERSION).tar
+	MAKE=${MAKE} ${MAKE} -C ../libtommath-$(VERSION) clean manual poster docs
+	tar -c ../libtommath-$(VERSION)/* | xz -9 > ../ltm-$(VERSION).tar.xz
+	cd .. ; zip -9r ltm-$(VERSION).zip libtommath-$(VERSION)
 
 new_file:
 	bash updatemakes.sh
diff --git a/makefile.include b/makefile.include
index b48fac4..c862f0f 100644
--- a/makefile.include
+++ b/makefile.include
@@ -3,9 +3,8 @@
 #
 
 #version of library
-VER_MAJOR=1
-VER_MINOR=0
-VER_PATCH=0
+VERSION=1.0
+VERSION_SO=1:0
 
 # default make target
 default: ${LIBNAME}
diff --git a/makefile.shared b/makefile.shared
index eee35c7..559720e 100644
--- a/makefile.shared
+++ b/makefile.shared
@@ -48,7 +48,7 @@ objs: $(OBJECTS)
 	$(LTCOMPILE) $(CFLAGS) $(LDFLAGS) -o $@ -c $<
 
 $(LIBNAME):  $(OBJECTS)
-	$(LT) --mode=link --tag=CC $(CC) $(LDFLAGS) *.lo -o $(LIBNAME) -rpath $(LIBPATH) -version-info $(VER_MAJOR):$(VER_MINOR)
+	$(LT) --mode=link --tag=CC $(CC) $(LDFLAGS) *.lo -o $(LIBNAME) -rpath $(LIBPATH) -version-info $(VERSION_SO)
 
 install: $(LIBNAME)
 	install -d $(DESTDIR)$(LIBPATH)