diff --git a/m4/virt-lib.m4 b/m4/virt-lib.m4
index cff4fbb8da..75b9b1dec1 100644
--- a/m4/virt-lib.m4
+++ b/m4/virt-lib.m4
@@ -1,7 +1,7 @@
 dnl
 dnl virt-lib.m4: Helper macros for checking for libraries
 dnl
-dnl Copyright (C) 2012-2013 Red Hat, Inc.
+dnl Copyright (C) 2012-2014 Red Hat, Inc.
 dnl
 dnl This library is free software; you can redistribute it and/or
 dnl modify it under the terms of the GNU Lesser General Public
@@ -54,16 +54,17 @@ AC_DEFUN([LIBVIRT_CHECK_LIB],[
   m4_pushdef([header_name], [$4])
 
   m4_pushdef([check_name_lc], m4_tolower(check_name))
+  m4_pushdef([check_name_dash], m4_translit(check_name_lc, [_], [-]))
 
   m4_pushdef([config_var], [WITH_]check_name)
   m4_pushdef([make_var], [WITH_]check_name)
   m4_pushdef([cflags_var], check_name[_CFLAGS])
   m4_pushdef([libs_var], check_name[_LIBS])
-  m4_pushdef([arg_var], [with-]check_name_lc)
+  m4_pushdef([arg_var], [with-]check_name_dash)
   m4_pushdef([with_var], [with_]check_name_lc)
 
   m4_divert_text([DEFAULTS], [with_var][=check])
-  AC_ARG_WITH(check_name_lc,
+  AC_ARG_WITH(check_name_dash,
     [AS_HELP_STRING([--arg_var],
                     [with lib]]m4_dquote(library_name)[[ support @<:@default=check@:>@])])
 
@@ -126,6 +127,7 @@ AC_DEFUN([LIBVIRT_CHECK_LIB],[
   m4_popdef([make_var])
   m4_popdef([config_var])
 
+  m4_popdef([check_name_dash])
   m4_popdef([check_name_lc])
 
   m4_popdef([header_name])
@@ -182,18 +184,19 @@ AC_DEFUN([LIBVIRT_CHECK_LIB_ALT],[
   m4_pushdef([header_name_alt], [$8])
 
   m4_pushdef([check_name_lc], m4_tolower(check_name))
+  m4_pushdef([check_name_dash], m4_translit(check_name_lc, [_], [-]))
 
   m4_pushdef([config_var], [WITH_]check_name)
   m4_pushdef([make_var], [WITH_]check_name)
   m4_pushdef([cflags_var], check_name[_CFLAGS])
   m4_pushdef([libs_var], check_name[_LIBS])
-  m4_pushdef([arg_var], [with-]check_name_lc)
+  m4_pushdef([arg_var], [with-]check_name_dash)
   m4_pushdef([with_var], [with_]check_name_lc)
   m4_pushdef([config_var_alt], [WITH_]check_name_alt)
   m4_pushdef([make_var_alt], [WITH_]check_name_alt)
 
   m4_divert_text([DEFAULTS], [with_var][=check])
-  AC_ARG_WITH(check_name_lc,
+  AC_ARG_WITH(check_name_dash,
     [AS_HELP_STRING([--arg_var],
                     [with lib]]m4_dquote(library_name)[[ support @<:@default=check@:>@])])
 
@@ -273,6 +276,7 @@ AC_DEFUN([LIBVIRT_CHECK_LIB_ALT],[
   m4_popdef([config_var])
 
   m4_popdef([check_name_lc])
+  m4_popdef([check_name_dash])
 
   m4_popdef([header_name_alt])
   m4_popdef([function_name_alt])
@@ -310,16 +314,17 @@ AC_DEFUN([LIBVIRT_CHECK_PKG],[
   m4_pushdef([pc_version], [$3])
 
   m4_pushdef([check_name_lc], m4_tolower(check_name))
+  m4_pushdef([check_name_dash], m4_translit(check_name_lc, [_], [-]))
 
   m4_pushdef([config_var], [WITH_]check_name)
   m4_pushdef([make_var], [WITH_]check_name)
   m4_pushdef([cflags_var], check_name[_CFLAGS])
   m4_pushdef([libs_var], check_name[_LIBS])
-  m4_pushdef([arg_var], [with-]check_name_lc)
+  m4_pushdef([arg_var], [with-]check_name_dash)
   m4_pushdef([with_var], [with_]check_name_lc)
 
   m4_divert_text([DEFAULTS], [with_var][=check])
-  AC_ARG_WITH(check_name_lc,
+  AC_ARG_WITH(check_name_dash,
     [AS_HELP_STRING([--arg_var],
                    [with ]]m4_dquote(pc_name)[[ (>= ]]m4_dquote(pc_version)[[) support @<:@default=check@:>@])])
 
@@ -353,6 +358,7 @@ AC_DEFUN([LIBVIRT_CHECK_PKG],[
   m4_popdef([config_var])
 
   m4_popdef([check_name_lc])
+  m4_popdef([check_name_dash])
 
   m4_popdef([pc_version])
   m4_popdef([pc_name])