diff --git a/modules/unitypes b/modules/unitypes
index 3b851c6..7cd1a19 100644
--- a/modules/unitypes
+++ b/modules/unitypes
@@ -3,6 +3,7 @@ Base types for Unicode string functions.
 
 Files:
 lib/unitypes.in.h
+m4/libunistring-base.m4
 
 Depends-on:
 stdint