diff --git a/src/main/java/fucoin/configurations/internal/NodeHelper.java b/src/main/java/fucoin/configurations/internal/NodeHelper.java
index abb0280e6e7b212cd1b38df0b95b544e607f3fee..359dcdeccf4246018b90aea548ed954fdd9d10f4 100644
--- a/src/main/java/fucoin/configurations/internal/NodeHelper.java
+++ b/src/main/java/fucoin/configurations/internal/NodeHelper.java
@@ -11,6 +11,8 @@ public class NodeHelper {
             return "Wallet" + n.getId();
         }
 
+        label = label.replace(" ", "_");
+
         if (Character.isDigit(label.charAt(0))) {
             return "Wallet" + label;
         }