diff --git a/sql/CMakeLists.txt b/sql/CMakeLists.txt
index c52b2ae6..86490129 100644
--- a/sql/CMakeLists.txt
+++ b/sql/CMakeLists.txt
@@ -7,3 +7,4 @@ install(FILES version-004.sql DESTINATION ${SQL_DEST})
 install(FILES version-005.sql DESTINATION ${SQL_DEST})
 install(FILES version-006.sql DESTINATION ${SQL_DEST})
 install(FILES version-007.sql DESTINATION ${SQL_DEST})
+install(FILES version-008.sql DESTINATION ${SQL_DEST})
diff --git a/sql/version-008.sql b/sql/version-008.sql
new file mode 100644
index 00000000..7e2ee90c
--- /dev/null
+++ b/sql/version-008.sql
@@ -0,0 +1,5 @@
+--
+-- Index the in_reply_to column, since we're searching on it now.
+--
+
+CREATE INDEX MessageTableInReplyToIndex ON MessageTable(in_reply_to);