1 files changed, 2 insertions, 2 deletions
diff --git a/lib/url.c b/lib/url.c
index a290e3cea..ac496bb8d 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -1397,7 +1397,7 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
      * Set HTTP Authentication type BITMASK.
      */
   {
-    long auth = va_arg(param, long);
+    unsigned long auth = va_arg(param, unsigned long);
 
     /* the DIGEST_IE bit is only used to set a special marker, for all the
        rest we need to handle it as normal DIGEST */
@@ -1461,7 +1461,7 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
      * Set HTTP Authentication type BITMASK.
      */
   {
-    long auth = va_arg(param, long);
+    unsigned long auth = va_arg(param, unsigned long);
 
     /* the DIGEST_IE bit is only used to set a special marker, for all the
        rest we need to handle it as normal DIGEST */