diff --git a/doc/design-monitoring-agent.rst b/doc/design-monitoring-agent.rst
index 13702f53b21967a262782ab8cf63c6da91c51a50..5f40feaf44e34cd0c76492d4c0e9086e1ced9788 100644
--- a/doc/design-monitoring-agent.rst
+++ b/doc/design-monitoring-agent.rst
@@ -66,7 +66,7 @@ the data collectors:
   report. Built-in data collectors (as opposed to those implemented as
   plugins) should have "B" as the version number.
 
-``formatVersion``
+``format_version``
   The format of what is represented in the "data" field for each data
   collector might change over time. Every time this happens, the
   format_version should be changed, so that who reads the report knows
@@ -103,7 +103,7 @@ Here follows a minimal example of a report::
   {
       "name" : "TheCollectorIdentifier",
       "version" : "1.2",
-      "formatVersion" : 1,
+      "format_version" : 1,
       "timestamp" : 1351607182000000000,
       "category" : null,
       "kind" : 0,
@@ -112,7 +112,7 @@ Here follows a minimal example of a report::
   {
       "name" : "AnotherDataCollector",
       "version" : "B",
-      "formatVersion" : 7,
+      "format_version" : 7,
       "timestamp" : 1351609526123854000,
       "category" : "storage",
       "kind" : 1,
diff --git a/src/Ganeti/DataCollectors/Drbd.hs b/src/Ganeti/DataCollectors/Drbd.hs
index 92f53eef28bf7d62c17d50ab4c4f7be11c68adde..5f50793404ece84b6a9337875da9726958ce86aa 100644
--- a/src/Ganeti/DataCollectors/Drbd.hs
+++ b/src/Ganeti/DataCollectors/Drbd.hs
@@ -29,6 +29,7 @@ module Ganeti.DataCollectors.Drbd
   , arguments
   , dcName
   , dcVersion
+  , dcFormatVersion
   ) where