diff --git a/src/uint256.h b/src/uint256.h
index 6d016ab16..3729c981a 100644
--- a/src/uint256.h
+++ b/src/uint256.h
@@ -19,7 +19,7 @@ class base_blob
 {
 protected:
     enum { WIDTH=BITS/8 };
-    uint8_t data[WIDTH];
+    alignas(uint32_t) uint8_t data[WIDTH];
 public:
     base_blob()
     {