diff --git a/library/x509_crt.c b/library/x509_crt.c
index 3652a8c..1ca61e5 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -2182,7 +2182,7 @@
 
     if( ret != 0 )
     {
-        *flags = (uint32_t) -1;
+        *flags = -1;
         return( ret );
     }