diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index b7fd8e00b346..4dddf579560f 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2258,6 +2258,9 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
 		struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev;
 		struct nd_mapping_desc *mapping;
 
+		/* range index 0 == unmapped in SPA or invalid-SPA */
+		if (memdev->range_index == 0 || spa->range_index == 0)
+			continue;
 		if (memdev->range_index != spa->range_index)
 			continue;
 		if (count >= ND_MAX_MAPPINGS) {