diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
index d5e5412059..616b42f33f 100644
--- a/src/fstab-generator/fstab-generator.c
+++ b/src/fstab-generator/fstab-generator.c
@@ -539,7 +539,7 @@ static int parse_fstab(bool initrd) {
                 if (!what)
                         return log_oom();
 
-                if (is_device_path(what) && path_is_read_only_fs("sys") > 0) {
+                if (is_device_path(what) && path_is_read_only_fs("/sys") > 0) {
                         log_info("Running in a container, ignoring fstab device entry for %s.", what);
                         continue;
                 }