diff --git a/expat/tests/runtests.c b/expat/tests/runtests.c
index 33615e94..7d912ae5 100644
--- a/expat/tests/runtests.c
+++ b/expat/tests/runtests.c
@@ -8682,7 +8682,7 @@ unknown_released_encoding_handler(void *UNUSED_P(data),
                                   const XML_Char *encoding,
                                   XML_Encoding *info)
 {
-    if (!strcmp(encoding, "unsupported-encoding")) {
+    if (!xcstrcmp(encoding, XCS("unsupported-encoding"))) {
         int i;
 
         for (i = 0; i < 256; i++)