diff --git a/configure.ac b/configure.ac
index 22d1566..7d507b8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,12 +85,6 @@ AC_ARG_WITH(system-libpam,
     [with_system_libpam=no])
 AM_CONDITIONAL([WITH_SYSTEM_LIBPAM], [test x"$with_system_libpam" = x"yes"])
 
-AC_ARG_WITH(system-liboath,
-    AC_HELP_STRING([--with-system-liboath], [use system liboath]),
-    [],
-    [with_system_liboath=no])
-AM_CONDITIONAL([WITH_SYSTEM_LIBOATH], [test x"$with_system_liboath" = x"yes"])
-
 AC_CHECK_HEADERS([crypt.h])
 
 AC_CHECK_FUNCS([asprintf vasprintf])
@@ -127,13 +121,6 @@ SYSTEM_LIBPAM="${LIBS}"
 LIBS="${saved_LIBS}"
 AC_SUBST(SYSTEM_LIBPAM)
 
-saved_LIBS="${LIBS}"
-LIBS=""
-AC_CHECK_LIB([oath], [oath_key_alloc])
-SYSTEM_LIBOATH="${LIBS}"
-LIBS="${saved_LIBS}"
-AC_SUBST(SYSTEM_LIBOATH)
-
 AC_ARG_ENABLE([developer-warnings],
     AS_HELP_STRING([--enable-developer-warnings], [enable strict warnings (default is NO)]),
     [CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual"])