diff --git a/src/soc/sifive/fu540/cbmem.c b/src/soc/sifive/fu540/cbmem.c
index af04130..53e5fcf 100644
--- a/src/soc/sifive/fu540/cbmem.c
+++ b/src/soc/sifive/fu540/cbmem.c
@@ -6,8 +6,7 @@
 #include <soc/sdram.h>
 #include <symbols.h>
 
-void *cbmem_top_chipset(void)
+uintptr_t cbmem_top_chipset(void)
 {
-	return (void *)MIN((uintptr_t)_dram + sdram_size_mb() * MiB,
-			   FU540_MAXDRAM);
+	return MIN((uintptr_t)_dram + sdram_size_mb() * MiB, FU540_MAXDRAM);
 }