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-rw-r--r--crypto/src/security/AgreementUtilities.cs5
1 files changed, 2 insertions, 3 deletions
diff --git a/crypto/src/security/AgreementUtilities.cs b/crypto/src/security/AgreementUtilities.cs
index d74ec7368..4c61ac354 100644
--- a/crypto/src/security/AgreementUtilities.cs
+++ b/crypto/src/security/AgreementUtilities.cs
@@ -1,5 +1,4 @@
 using System.Collections;
-using System.Globalization;
 
 using Org.BouncyCastle.Asn1;
 using Org.BouncyCastle.Asn1.X9;
@@ -39,7 +38,7 @@ namespace Org.BouncyCastle.Security
 		public static IBasicAgreement GetBasicAgreement(
 			string algorithm)
 		{
-			string upper = algorithm.ToUpperInvariant();
+			string upper = Platform.ToUpperInvariant(algorithm);
 			string mechanism = (string) algorithms[upper];
 
 			if (mechanism == null)
@@ -73,7 +72,7 @@ namespace Org.BouncyCastle.Security
 			string agreeAlgorithm,
 			string wrapAlgorithm)
 		{
-			string upper = agreeAlgorithm.ToUpperInvariant();
+			string upper = Platform.ToUpperInvariant(agreeAlgorithm);
 			string mechanism = (string) algorithms[upper];
 
 			if (mechanism == null)