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@@ -828,7 +828,7 @@ _starpu_init_topology (struct _starpu_machine_config *config)
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#ifdef STARPU_HAVE_HWLOC
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hwloc_topology_init(&topology->hwtopology);
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char *hwloc_input = starpu_getenv("STARPU_HWLOC_INPUT");
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- if (hwloc_input)
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+ if (hwloc_input && hwloc_input[0])
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hwloc_topology_set_xml(topology->hwtopology, hwloc_input);
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_starpu_topology_filter(topology->hwtopology);
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hwloc_topology_load(topology->hwtopology);
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