diff --git a/src/HttpServer.c b/src/HttpServer.c
index 908627a..df9afb6 100644
--- a/src/HttpServer.c
+++ b/src/HttpServer.c
@@ -362,10 +362,12 @@ HttpServerCreate(unsigned short port, unsigned int nThreads, unsigned int maxCon
         goto error;
     }
 
+#ifdef SO_REUSEPORT
     if (setsockopt(server->sd, SOL_SOCKET, SO_REUSEPORT, &ENABLE, sizeof(int)) < 0)
     {
         goto error;
     }
+#endif
 
     sa.sin_family = AF_INET;
     sa.sin_port = htons(port);
diff --git a/src/Util.c b/src/Util.c
index 6bf6b11..d6a0cc3 100644
--- a/src/Util.c
+++ b/src/Util.c
@@ -135,7 +135,7 @@ UtilStringToBytes(char *str)
 
     while (*str)
     {
-        if (isdigit(*str))
+        if (isdigit((unsigned char) *str))
         {
             bytes *= 10;
             bytes += *str - '0';