diff --git i/Makefile.PL w/Makefile.PL
index 713656a..bdf1a9e 100644
--- i/Makefile.PL
+++ w/Makefile.PL
@@ -127,7 +127,7 @@ if (!defined($curl_h)) {
     close H;
 
     for my $e (sort @syms) {
-       if($e =~ /(OBSOLETE|^CURL_EXTERN|^CURL_STRICTER\z|^CURL_DID_MEMORY_FUNC_TYPEDEFS\z|_LAST\z|_LASTENTRY\z|^CURLINC_)/) {
+       if($e =~ /(OBSOLETE|^CURL_EXTERN|^CURL_STRICTER\z|^CURL_WIN32\z|^CURLOPT\z|^CURL_DID_MEMORY_FUNC_TYPEDEFS\z|_LAST\z|_LASTENTRY\z|^CURLINC_)/) {
           next;
        }
        my ($group) = $e =~ m/^([^_]+_)/;