1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/src/asn1/DerUTCTime.cs b/crypto/src/asn1/DerUTCTime.cs
index ab8ca792d..639a2d4f4 100644
--- a/crypto/src/asn1/DerUTCTime.cs
+++ b/crypto/src/asn1/DerUTCTime.cs
@@ -86,7 +86,11 @@ namespace Org.BouncyCastle.Asn1
         public DerUtcTime(
             DateTime time)
         {
+#if PORTABLE
+            this.time = time.ToUniversalTime().ToString("yyMMddHHmmss", CultureInfo.InvariantCulture) + "Z";
+#else
             this.time = time.ToString("yyMMddHHmmss", CultureInfo.InvariantCulture) + "Z";
+#endif
         }
 
         internal DerUtcTime(