diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 88819659df83..05913e9fe082 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -3043,7 +3043,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev,
 	/* Verify that the index is within a valid range. */
 	num_domains = of_count_phandle_with_args(dev->of_node, "power-domains",
 						 "#power-domain-cells");
-	if (index >= num_domains)
+	if (num_domains < 0 || index >= num_domains)
 		return NULL;
 
 	/* Allocate and register device on the genpd bus. */