From fb6f2d1790afbd99c628f5959fa2027e77df6266 Mon Sep 17 00:00:00 2001
From: JacobBarthelmeh <jacob@wolfssl.com>
Date: Tue, 14 Mar 2023 16:00:01 -0700
Subject: [PATCH] cast on input of XISALNUM

---
 src/conf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/conf.c b/src/conf.c
index b19253b98..0a63243c4 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -743,7 +743,7 @@ static char* expandValue(WOLFSSL_CONF *conf, const char* section,
                     strIdx += 2;
                     startIdx = strIdx;
                 }
-                while (*strIdx && (XISALNUM(*strIdx) || *strIdx == '_'))
+                while (*strIdx && (XISALNUM((int)(*strIdx)) || *strIdx == '_'))
                     strIdx++;
                 endIdx = strIdx;
                 if (startIdx == endIdx) {