diff --git a/modules/unistr/u8-mbsnlen-tests b/modules/unistr/u8-mbsnlen-tests
index b5b3925..a65d4cf 100644
--- a/modules/unistr/u8-mbsnlen-tests
+++ b/modules/unistr/u8-mbsnlen-tests
@@ -3,6 +3,7 @@ tests/unistr/test-u8-mbsnlen.c
 tests/macros.h
 
 Depends-on:
+unistr/u8-mbtouc
 
 configure.ac: