diff --git a/sys/powerpc/ofw/ofw_machdep.c b/sys/powerpc/ofw/ofw_machdep.c
index 0e6c30beb7ac..f77fd80b4679 100644
--- a/sys/powerpc/ofw/ofw_machdep.c
+++ b/sys/powerpc/ofw/ofw_machdep.c
@@ -487,7 +487,7 @@ ofw_numa_mem_regions(struct numa_mem_region *memp, int *memsz)
 		MPASS(count == 1);
 		OF_getencprop(phandle, "ibm,associativity",
 			associativity, res);
-		curmemp->mr_domain = associativity[3] - 1;
+		curmemp->mr_domain = associativity[3];
 		if (bootverbose)
 			printf("%s %#jx-%#jx domain(%ju)\n",
 			    name, (uintmax_t)curmemp->mr_start,
diff --git a/sys/powerpc/ofw/ofw_pcibus.c b/sys/powerpc/ofw/ofw_pcibus.c
index 4d0d6de4e12a..c96f863aa523 100644
--- a/sys/powerpc/ofw/ofw_pcibus.c
+++ b/sys/powerpc/ofw/ofw_pcibus.c
@@ -403,7 +403,7 @@ ofw_pcibus_parse_associativity(device_t dev, int *domain)
 	OF_getencprop(node, "ibm,associativity",
 		associativity, res);
 
-	*domain = associativity[3] - 1;
+	*domain = associativity[3];
 	if (bootverbose)
 		device_printf(dev, "domain(%d)\n", *domain);
 	return (0);