diff --git a/src/util/amount.c b/src/util/amount.c
index d52a32cf6..7765c74bb 100644
--- a/src/util/amount.c
+++ b/src/util/amount.c
@@ -32,7 +32,7 @@
 /**
  * Maximum legal 'value' for an amount, based on IEEE double (for JavaScript compatibility).
  */
-#define MAX_AMOUNT_VALUE (1LLU << 53)
+#define MAX_AMOUNT_VALUE (1LLU << 52)
 
 
 /**