diff --git a/src/cpu/amd/mtrr/amd_mtrr.c b/src/cpu/amd/mtrr/amd_mtrr.c
index f904df9b04..64ed5dc073 100644
--- a/src/cpu/amd/mtrr/amd_mtrr.c
+++ b/src/cpu/amd/mtrr/amd_mtrr.c
@@ -19,5 +19,5 @@ void add_uma_resource_below_tolm(struct device *nb, int idx)
 	printk(BIOS_INFO, "%s: uma size 0x%08x, memory start 0x%08x\n", __func__, uma_size,
 	       uma_base);
 
-	uma_resource_kb(nb, idx, uma_base / KiB, uma_size / KiB);
+	mmio_range(nb, idx, uma_base, uma_size);
 }