diff --git a/src/cli/cli.cpp b/src/cli/cli.cpp
index a88bb3b1d..a46a198ec 100644
--- a/src/cli/cli.cpp
+++ b/src/cli/cli.cpp
@@ -1624,7 +1624,7 @@ void Interpreter::ProcessNetworkTime(int argc, char *argv[])
 
         networkTimeStatus = otNetworkTimeGet(mInstance, time);
 
-        mServer->OutputFormat("Network Time:     %dus", time);
+        mServer->OutputFormat("Network Time:     %luus", time);
 
         switch (networkTimeStatus)
         {