diff --git a/core/src/main/java/com/google/bitcoin/core/Peer.java b/core/src/main/java/com/google/bitcoin/core/Peer.java
index 759a789e..fba9a230 100644
--- a/core/src/main/java/com/google/bitcoin/core/Peer.java
+++ b/core/src/main/java/com/google/bitcoin/core/Peer.java
@@ -894,7 +894,7 @@ public class Peer {
         }
 
         if (pingAfterGetData)
-            sendMessage(new Ping((long) Math.random() * Long.MAX_VALUE));
+            sendMessage(new Ping((long) (Math.random() * Long.MAX_VALUE)));
     }
 
     /**
@@ -1150,7 +1150,7 @@ public class Peer {
      * @throws ProtocolException if the peer version is too low to support measurable pings.
      */
     public ListenableFuture<Long> ping() throws IOException, ProtocolException {
-        return ping((long) Math.random() * Long.MAX_VALUE);
+        return ping((long) (Math.random() * Long.MAX_VALUE));
     }
 
     protected ListenableFuture<Long> ping(long nonce) throws IOException, ProtocolException {