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-rw-r--r--src/kerneldevice/mm-kernel-device.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/kerneldevice/mm-kernel-device.c b/src/kerneldevice/mm-kernel-device.c
index abe0ddd0..fa865394 100644
--- a/src/kerneldevice/mm-kernel-device.c
+++ b/src/kerneldevice/mm-kernel-device.c
@@ -203,6 +203,9 @@ mm_kernel_device_cmp (MMKernelDevice *a,
g_return_val_if_fail (MM_IS_KERNEL_DEVICE (a), FALSE);
g_return_val_if_fail (MM_IS_KERNEL_DEVICE (b), FALSE);
+ if (G_OBJECT_TYPE (a) != G_OBJECT_TYPE (b))
+ return G_OBJECT_TYPE (a) < G_OBJECT_TYPE (b);
+
return (MM_KERNEL_DEVICE_GET_CLASS (a)->cmp ?
MM_KERNEL_DEVICE_GET_CLASS (a)->cmp (a, b) :
FALSE);