diff --git a/src/libsysprof-analyze/sysprof-mount-namespace.c b/src/libsysprof-analyze/sysprof-mount-namespace.c
index 89efd86a..7f2c3e73 100644
--- a/src/libsysprof-analyze/sysprof-mount-namespace.c
+++ b/src/libsysprof-analyze/sysprof-mount-namespace.c
@@ -161,6 +161,9 @@ sysprof_mount_namespace_find_device (SysprofMountNamespace *self,
   g_assert (SYSPROF_IS_MOUNT_NAMESPACE (self));
   g_assert (SYSPROF_IS_MOUNT (mount));
 
+  while (relative_path[0] == '/')
+    relative_path++;
+
   mount_source = sysprof_mount_get_mount_source (mount);
   subvolume = sysprof_mount_get_superblock_option (mount, "subvol");