diff --git a/src/soc/amd/stoneyridge/memmap.c b/src/soc/amd/stoneyridge/memmap.c
index f015740..7a225e1 100644
--- a/src/soc/amd/stoneyridge/memmap.c
+++ b/src/soc/amd/stoneyridge/memmap.c
@@ -12,7 +12,7 @@
 #include <soc/iomap.h>
 #include <amdblocks/biosram.h>
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
 	msr_t tom = rdmsr(TOP_MEM);
 
@@ -20,8 +20,7 @@
 		return 0;
 
 	/* 8MB alignment to keep MTRR usage low */
-	return (void *)ALIGN_DOWN(restore_top_of_low_cacheable()
-				  - CONFIG_SMM_TSEG_SIZE, 8 * MiB);
+	return ALIGN_DOWN(restore_top_of_low_cacheable() - CONFIG_SMM_TSEG_SIZE, 8 * MiB);
 }
 
 static uintptr_t smm_region_start(void)