diff --git a/protoc_gen_d/google/protobuf/descriptor.d b/protoc_gen_d/google/protobuf/descriptor.d
index 4d71c27..5e2b061 100644
--- a/protoc_gen_d/google/protobuf/descriptor.d
+++ b/protoc_gen_d/google/protobuf/descriptor.d
@@ -171,7 +171,7 @@ class FileOptions
 
     enum OptimizeMode
     {
-        UNKNOEN = 0,
+        UNKNOWN = 0,
         SPEED = 1,
         CODE_SIZE = 2,
         LITE_RUNTIME = 3,
diff --git a/protoc_gen_d/proto/google/protobuf/descriptor.proto b/protoc_gen_d/proto/google/protobuf/descriptor.proto
index 7bebafe..40ba5e6 100644
--- a/protoc_gen_d/proto/google/protobuf/descriptor.proto
+++ b/protoc_gen_d/proto/google/protobuf/descriptor.proto
@@ -355,7 +355,7 @@ message FileOptions {
 
   // Generated classes can be optimized for speed or code size.
   enum OptimizeMode {
-    UNKNOEN = 0;
+    UNKNOWN = 0;
     SPEED = 1;        // Generate complete code for parsing, serialization,
                       // etc.
     CODE_SIZE = 2;    // Use ReflectionOps to implement these methods.