diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -79,7 +79,7 @@
      * If this flag set, CTxIn::nSequence is NOT interpreted as a relative
      * lock-time.
      */
-    static const uint32_t SEQUENCE_LOCKTIME_DISABLE_FLAG = (1 << 31);
+    static const uint32_t SEQUENCE_LOCKTIME_DISABLE_FLAG = (1U << 31);
 
     /**
      * If CTxIn::nSequence encodes a relative lock-time and this flag is set,