diff --git a/src/soc/amd/picasso/root_complex.c b/src/soc/amd/picasso/root_complex.c
index 4ea8bc2..076588e 100644
--- a/src/soc/amd/picasso/root_complex.c
+++ b/src/soc/amd/picasso/root_complex.c
@@ -136,7 +136,7 @@
 	ram_resource(dev, idx++, early_reserved_dram_end / KiB,
 		     (mem_usable - early_reserved_dram_end) / KiB);
 
-	mmconf_resource(dev, MMIO_CONF_BASE);
+	mmconf_resource(dev, idx++);
 
 	if (!hob) {
 		printk(BIOS_ERR, "%s incomplete because no HOB list was found\n",