diff --git a/src/login/logind-session-device.h b/src/login/logind-session-device.h
index a1cf17af92..a9ead7bdca 100644
--- a/src/login/logind-session-device.h
+++ b/src/login/logind-session-device.h
@@ -39,9 +39,9 @@ struct SessionDevice {
         dev_t dev;
         char *node;
         int fd;
-        bool active;
-        DeviceType type;
-        bool pushed_fd;
+        DeviceType type:3;
+        bool active:1;
+        bool pushed_fd:1;
 
         LIST_FIELDS(struct SessionDevice, sd_by_device);
 };