diff --git a/gio/gunixmounts.c b/gio/gunixmounts.c
index 0035d57e7..4d19217ca 100644
--- a/gio/gunixmounts.c
+++ b/gio/gunixmounts.c
@@ -306,7 +306,6 @@ g_unix_is_system_fs_type (const char *fs_type)
     "autofs",
     "autofs4",
     "cgroup",
-    "cifs",
     "configfs",
     "cxfs",
     "debugfs",
@@ -328,8 +327,6 @@ g_unix_is_system_fs_type (const char *fs_type)
     "mfs",
     "mqueue",
     "ncpfs",
-    "nfs",
-    "nfs4",
     "nfsd",
     "nullfs",
     "ocfs2",
@@ -342,7 +339,6 @@ g_unix_is_system_fs_type (const char *fs_type)
     "rpc_pipefs",
     "securityfs",
     "selinuxfs",
-    "smbfs",
     "sysfs",
     "tmpfs",
     "usbfs",
diff --git a/gio/tests/unix-mounts.c b/gio/tests/unix-mounts.c
index 3d54047dc..67b8c8d98 100644
--- a/gio/tests/unix-mounts.c
+++ b/gio/tests/unix-mounts.c
@@ -33,6 +33,12 @@ test_is_system_fs_type (void)
 {
   g_assert_true (g_unix_is_system_fs_type ("tmpfs"));
   g_assert_false (g_unix_is_system_fs_type ("ext4"));
+
+  /* Check that some common network file systems aren’t considered ‘system’. */
+  g_assert_false (g_unix_is_system_fs_type ("cifs"));
+  g_assert_false (g_unix_is_system_fs_type ("nfs"));
+  g_assert_false (g_unix_is_system_fs_type ("nfs4"));
+  g_assert_false (g_unix_is_system_fs_type ("smbfs"));
 }
 
 static void