diff --git a/examples/platforms/nrf52811/openthread-core-nrf52811-config.h b/examples/platforms/nrf52811/openthread-core-nrf52811-config.h
index e4fb73676..ae09cdc25 100644
--- a/examples/platforms/nrf52811/openthread-core-nrf52811-config.h
+++ b/examples/platforms/nrf52811/openthread-core-nrf52811-config.h
@@ -77,7 +77,7 @@
  *
  */
 #ifndef OPENTHREAD_CONFIG_NUM_MESSAGE_BUFFERS
-#define OPENTHREAD_CONFIG_NUM_MESSAGE_BUFFERS 64
+#define OPENTHREAD_CONFIG_NUM_MESSAGE_BUFFERS 60
 #endif
 
 /**