diff --git a/attn/attn_monitor.cpp b/attn/attn_monitor.cpp
index afd99d1..a3ecfac 100644
--- a/attn/attn_monitor.cpp
+++ b/attn/attn_monitor.cpp
@@ -13,17 +13,17 @@
     iv_gpioEventDescriptor.async_wait(
         boost::asio::posix::stream_descriptor::wait_read,
         [this](const boost::system::error_code& ec) {
-        if (ec)
-        {
-            trace::err("GPIO Async wait error: %s", ec.message().c_str());
-        }
-        else
-        {
-            trace::inf("Attention GPIO active");
-            handleGPIOEvent(); // gpio trigger detected
-        }
-        return;
-    }); // register async callback
+            if (ec)
+            {
+                trace::err("GPIO Async wait error: %s", ec.message().c_str());
+            }
+            else
+            {
+                trace::inf("Attention GPIO active");
+                handleGPIOEvent(); // gpio trigger detected
+            }
+            return;
+        }); // register async callback
 }
 
 /** @brief Handle the GPIO state change event */