diff --git a/src/main/java/net/schmizz/sshj/common/StreamCopier.java b/src/main/java/net/schmizz/sshj/common/StreamCopier.java
index 6247f2b8..8ccb841f 100644
--- a/src/main/java/net/schmizz/sshj/common/StreamCopier.java
+++ b/src/main/java/net/schmizz/sshj/common/StreamCopier.java
@@ -136,7 +136,7 @@ public class StreamCopier {
 
         final double timeSeconds = (System.currentTimeMillis() - startTime) / 1000.0;
         final double sizeKiB = count / 1024.0;
-        log.debug(String.format("%1$d KiB transferred in %2$d seconds (%3$d KiB/s)", sizeKiB, timeSeconds, (sizeKiB / timeSeconds)));
+        log.debug(String.format("%1$,.f KiB transferred in %2$,.1f seconds (%3$,.2f KiB/s)", sizeKiB, timeSeconds, (sizeKiB / timeSeconds)));
 
         if (length != -1 && read == -1)
             throw new IOException("Encountered EOF, could not transfer " + length + " bytes");