diff --git a/library/x509parse.c b/library/x509parse.c
index 631fe55..e14a163 100644
--- a/library/x509parse.c
+++ b/library/x509parse.c
@@ -2362,7 +2362,7 @@
     n = size;
 
     nr = ( serial->len <= 32 )
-        ? serial->len  : 32;
+        ? serial->len  : 28;
 
     for( i = 0; i < nr; i++ )
     {
@@ -2371,6 +2371,12 @@
         SAFE_SNPRINTF();
     }
 
+    if( nr != serial->len )
+    {
+        ret = snprintf( p, n, "...." );
+        SAFE_SNPRINTF();
+    }
+
     return( (int) ( size - n ) );
 }