diff --git a/app/init.php b/app/init.php
index d83101c98f..7b252d19e7 100644
--- a/app/init.php
+++ b/app/init.php
@@ -246,7 +246,7 @@ const METRIC_EXECUTIONS_COMPUTE  = 'executions.compute';
 const METRIC_EXECUTIONS_MB_SECONDS  = 'executions.mb_seconds';
 const METRIC_FUNCTION_ID_EXECUTIONS  = '{functionInternalId}.executions';
 const METRIC_FUNCTION_ID_EXECUTIONS_COMPUTE  = '{functionInternalId}.executions.compute';
-const METRIC_FUNCTION_ID_EXECUTIONS_MB_SECONDS  = '{functionInternalId}.executions.mb_seconds';
+const METRIC_FUNCTION_ID_EXECUTIONS_MB_SECONDS  = '{functionInternalId}.executions.mbSeconds';
 const METRIC_NETWORK_REQUESTS  = 'network.requests';
 const METRIC_NETWORK_INBOUND  = 'network.inbound';
 const METRIC_NETWORK_OUTBOUND  = 'network.outbound';