diff --git a/configure.in b/configure.in
index b5f71b02a..7233b4f2c 100644
--- a/configure.in
+++ b/configure.in
@@ -20,6 +20,7 @@ AC_INIT(strongSwan,4.3.3)
 AM_INIT_AUTOMAKE(tar-ustar)
 AC_SUBST(confdir, '${sysconfdir}')
 PKG_PROG_PKG_CONFIG
+AC_LIB_PREFIX
 
 dnl =================================
 dnl  check --enable-xxx & --with-xxx