diff --git a/MANIFEST.in b/MANIFEST.in
index a859566..b053551 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,5 +5,6 @@ recursive-include odpi *.h
 prune odpi/test
 prune odpi/samples
 recursive-include src *.c
+recursive-include src *.h
 recursive-include samples *.py *.sql
 recursive-include test *.py *.sql