Add base64.h include

src/mod_sso/session.c

@@ -33,6 +33,7 @@
 #include "apr_strings.h"
 #include "apr_file_io.h"
 
+#include "base64.h"
 #include "mod_sso.h"
 
 static const char *session_cookie_name = "_sso_local_session";