--- curl-8.18.0/lib/urldata.h.old	2026-01-08 08:04:05.818085314 -0500
+++ curl-8.18.0/lib/urldata.h	2026-01-08 08:05:07.550747308 -0500
@@ -186,7 +186,9 @@
 #  include <gssapi.h>
 # else /* MIT Kerberos */
 #  include <gssapi/gssapi.h>
-#  include <gssapi/gssapi_krb5.h> /* for GSS_C_CHANNEL_BOUND_FLAG, in 1.19+ */
+#  ifdef GSS_C_CHANNEL_BOUND_FLAG
+#   include <gssapi/gssapi_krb5.h> /* for GSS_C_CHANNEL_BOUND_FLAG, in 1.19+ */
+#  endif
 # endif
 #endif