1 files changed, 2 insertions, 6 deletions
diff --git a/csharp/src/Google.Protobuf/JsonParser.cs b/csharp/src/Google.Protobuf/JsonParser.cs
index 9e5d8711..92029e06 100644
--- a/csharp/src/Google.Protobuf/JsonParser.cs
+++ b/csharp/src/Google.Protobuf/JsonParser.cs
@@ -617,13 +617,9 @@ namespace Google.Protobuf
                             return (float) value;
                         case FieldType.Enum:
                             CheckInteger(value);
-                            var enumValue = field.EnumType.FindValueByNumber((int) value);
-                            if (enumValue == null)
-                            {
-                                throw new InvalidProtocolBufferException($"Invalid enum value: {value} for enum type: {field.EnumType.FullName}");
-                            }
                             // Just return it as an int, and let the CLR convert it.
-                            return enumValue.Number;
+                            // Note that we deliberately don't check that it's a known value.
+                            return (int) value;
                         default:
                             throw new InvalidProtocolBufferException($"Unsupported conversion from JSON number for field type {field.FieldType}");
                     }