diff --git a/meson.build b/meson.build
index 7bcb872d1..28f9d3dc3 100644
--- a/meson.build
+++ b/meson.build
@@ -203,12 +203,12 @@ if get_option('enable-consolekit')
 endif
 
 systemdunitdir = get_option('with-systemdunitdir')
-if systemdunitdir == 'dynamic'
+if systemdunitdir == ''
   systemdunitdir = systemd.get_pkgconfig_variable('systemdsystemunitdir')
 endif
 
 udevdir = get_option('with-udevdir')
-if udevdir == 'dynamic'
+if udevdir == ''
   udevdir = udev.get_pkgconfig_variable('udevdir')
 endif
 
diff --git a/meson_options.txt b/meson_options.txt
index d039576d9..1e385ceb7 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -15,5 +15,5 @@ option('enable-dummy', type : 'boolean', value : false, description : 'enable th
 option('enable-gpg', type : 'boolean', value : true, description : 'enable the GPG verification support')
 option('enable-pkcs7', type : 'boolean', value : true, description : 'enable the PKCS7 verification support')
 option('with-bootdir', type : 'string', value : '/boot/efi', description : 'Directory for EFI system partition')
-option('with-systemdunitdir', type: 'string', value: 'dynamic', description: 'Directory for systemd units')
-option('with-udevdir', type: 'string', value: 'dynamic', description: 'Directory for udev rules')
+option('with-systemdunitdir', type: 'string', value: '', description: 'Directory for systemd units')
+option('with-udevdir', type: 'string', value: '', description: 'Directory for udev rules')