gistfile1.txt

diff --git a/lib/ext/openssl/ossl_x509name.c b/lib/ext/openssl/ossl_x509name.c
index ae50dc0..9348421 100644
--- a/lib/ext/openssl/ossl_x509name.c
+++ b/lib/ext/openssl/ossl_x509name.c
@@ -141,7 +141,7 @@ ossl_x509name_initialize(int argc, VALUE *argv, VALUE self)
       unsigned char *p;
       VALUE str = ossl_to_der_if_possible(arg);
       StringValue(str);
-      p = RSTRING_PTR(str);
+      p = (unsigned char*) RSTRING_PTR(str);
       if(!d2i_X509_NAME((X509_NAME**)&DATA_PTR(self), &p, RSTRING_LEN(str))){
         ossl_raise(eX509NameError, NULL);
       }