diff --git a/src/Microsoft.IdentityModel.JsonWebTokens/JsonWebTokenHandler.cs b/src/Microsoft.IdentityModel.JsonWebTokens/JsonWebTokenHandler.cs
index 3132ad2863..cf4ad2e264 100644
--- a/src/Microsoft.IdentityModel.JsonWebTokens/JsonWebTokenHandler.cs
+++ b/src/Microsoft.IdentityModel.JsonWebTokens/JsonWebTokenHandler.cs
@@ -566,7 +566,7 @@ public override async Task<TokenValidationResult> ValidateTokenAsync(SecurityTok
 
             var jwt = token as JsonWebToken;
             if (jwt == null)
-                return new TokenValidationResult { Exception = LogHelper.LogExceptionMessage(new SecurityTokenMalformedException(LogMessages.IDX14100)), IsValid = false };
+                return new TokenValidationResult { Exception = LogHelper.LogArgumentException<ArgumentException>(nameof(token), $"{nameof(token)} must be a {nameof(JsonWebToken)}."), IsValid = false };
 
             try
             {
@@ -614,7 +614,7 @@ private static TokenValidationResult ReadToken(string token, TokenValidationPara
                 {
                     return new TokenValidationResult
                     {
-                        Exception = LogHelper.LogExceptionMessage(new SecurityTokenMalformedException(LogMessages.IDX14100, ex)),
+                        Exception = ex,
                         IsValid = false
                     };
                 }