diff --git a/gio/gtlsfiledatabase.c b/gio/gtlsfiledatabase.c
index 4d7c6d48f..874d28521 100644
--- a/gio/gtlsfiledatabase.c
+++ b/gio/gtlsfiledatabase.c
@@ -35,7 +35,7 @@
  * @include: gio/gio.h
  *
  * #GTlsFileDatabase is implemented by #GTlsDatabase objects which load
- * their certificate information from a file. It is in interface which
+ * their certificate information from a file. It is an interface which
  * TLS library specific subtypes implement.
  *
  * Since: 2.30