diff --git a/bootstrap.sh b/bootstrap.sh
index 45ac8d5..74ecdb8 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -26,9 +26,9 @@
 autoheader || exit 1
 
 if libtoolize --version 1 >/dev/null 2>/dev/null; then
-  libtoolize --automake || exit 1
+  libtoolize --copy --automake || exit 1
 elif glibtoolize --version 1 >/dev/null 2>/dev/null; then
-  glibtoolize --automake || exit 1
+  glibtoolize --copy --automake || exit 1
 fi
 
 autoconf