diff --git a/lib/defines.h b/lib/defines.h
index 9121fa681de5d41220577cd5a3b0e14b6bbe6edd..944d02c5ff6c1d1dc3fecfa548efbbd7703a7510 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -35,7 +35,7 @@
 /*
  * Connection limits.
  */
-#define KR_CONN_RTT_MAX 10000
+#define KR_CONN_RTT_MAX 5000
 
 /*
  * Timers.