diff --git a/arch/riscv/include/asm/sparsemem.h b/arch/riscv/include/asm/sparsemem.h
index 87ab782be7023..2f901a410586d 100644
--- a/arch/riscv/include/asm/sparsemem.h
+++ b/arch/riscv/include/asm/sparsemem.h
@@ -5,7 +5,7 @@
 
 #ifdef CONFIG_SPARSEMEM
 #ifdef CONFIG_64BIT
-#define MAX_PHYSMEM_BITS	44
+#define MAX_PHYSMEM_BITS	56
 #else
 #define MAX_PHYSMEM_BITS	32
 #endif /* CONFIG_64BIT */