diff --git a/lib/support.js b/lib/support.js
index bfaba7b..c1e3293 100644
--- a/lib/support.js
+++ b/lib/support.js
@@ -131,7 +131,7 @@ function coinToDecimal(amount) {
 }
 
 function decimalToCoin(amount) {
-    return amount * global.config.coin.sigDigits;
+    return Math.ceil(amount * global.config.coin.sigDigits);
 }
 
 function bitcoinDecimalToCoin(amount) {