diff --git a/library/x509parse.c b/library/x509parse.c
index 8029bc5..83e5247 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -1402,7 +1402,7 @@
 {
     int i, n;
     char *p, *end;
-    static char buf[512];
+    static char buf[1024];
 
     p = buf;
     end = buf + sizeof( buf ) - 1;