diff --git a/bolt_riscv64.go b/bolt_riscv64.go
new file mode 100644
index 0000000..2d962d3
--- /dev/null
+++ b/bolt_riscv64.go
@@ -0,0 +1,10 @@
+package bbolt
+
+// maxMapSize represents the largest mmap size supported by Bolt.
+const maxMapSize = 0xFFFFFFFFFFFF // 256TB
+
+// maxAllocSize is the size used when creating array pointers.
+const maxAllocSize = 0x7FFFFFFF
+
+// Are unaligned load/stores broken on this arch?
+var brokenUnaligned = true