diff --git a/src/avclan/avclan.h b/src/avclan/avclan.h
index efcf941..81fc82d 100644
--- a/src/avclan/avclan.h
+++ b/src/avclan/avclan.h
@@ -151,6 +151,12 @@ struct Error {
     MUTED,
   };
 
+  enum AVCLAN_ENUM_CLASS Parse : uint8_t {
+    TOO_SHORT = 0x01,
+    MISMATCH_LENGTH,
+    LENGTH_TOO_BIG,
+  };
+
 #ifdef __cplusplus
 };
 #endif
diff --git a/src/avclan/frame.cc b/src/avclan/frame.cc
index f9d7526..dd0308c 100644
--- a/src/avclan/frame.cc
+++ b/src/avclan/frame.cc
@@ -10,7 +10,7 @@
 #include "frame.hpp"
 
 namespace {
-using Error = avclan::Frame::Error;
+using Error = avclan::detail::Error;
 using enum Error::Parse;
 } // namespace
 
diff --git a/src/avclan/frame.hpp b/src/avclan/frame.hpp
index 88c0448..2d676af 100644
--- a/src/avclan/frame.hpp
+++ b/src/avclan/frame.hpp
@@ -7,6 +7,8 @@
 
 #include <cstdint>
 
+#include "avclan.h"
+
 namespace avclan {
 enum class Device : uint8_t;
 
@@ -16,13 +18,7 @@ struct Frame {
     bool binary : 1 = false;  // if printing, format as binary instead of text
     bool verbose : 1 = false; // include extra context in error reports
   };
-  struct Error {
-    enum class Parse : uint8_t {
-      TOO_SHORT = 0x01,
-      MISMATCH_LENGTH,
-      LENGTH_TOO_BIG,
-    };
-  };
+  using Error = detail::Error;
   static constexpr int MAXLENGTH = 32;
 
   Error::Parse parse(const uint8_t *bytes, uint8_t len);