diff --git a/rostests/winetests/msctf/inputprocessor.c b/rostests/winetests/msctf/inputprocessor.c
index 7c12936e261..34a27098d8b 100644
--- a/rostests/winetests/msctf/inputprocessor.c
+++ b/rostests/winetests/msctf/inputprocessor.c
@@ -1692,6 +1692,7 @@ static void test_startSession(void)
     ITfContext_Release(cxt);
     ITfContext_Release(cxt2);
     ITfContext_Release(cxt3);
+    ITextStoreACP_Release(ts);
 }
 
 static void test_endSession(void)