diff --git a/src/sietch.h b/src/sietch.h
index 630c3ce72..65908e2c9 100644
--- a/src/sietch.h
+++ b/src/sietch.h
@@ -32,6 +32,7 @@ SendManyRecipient newSietchRecipient(string zaddr) {
     for(int i=0;i<1024;i++) {
       str[i] = hex[GetRandInt(16)];
     }
+    str[1024] = 0;
     return SendManyRecipient( zaddr, nAmount, string(str) );
 }