diff --git a/doc/developer.rst b/doc/developer.rst
index 6838b3a2..e0e2356e 100644
--- a/doc/developer.rst
+++ b/doc/developer.rst
@@ -72,7 +72,7 @@ items. This is more space consuming, but may be desired for the following reason
 
 * the parsing is resource consuming (network call or some CPU intensive operations are
   done)
-* it is desirable to to queries on parsed data. Indeed the parsed data is stored in a
+* it is desirable to do queries on parsed data. Indeed the parsed data are stored in a
   JSON_ field and its keys may be queried individually.
 
 The Raw XML is kept as the cache operates transparently, and a plugin may need raw data, or