diff --git a/extmod/modwebsocket.c b/extmod/modwebsocket.c
index eb11d006d9..3175c61671 100644
--- a/extmod/modwebsocket.c
+++ b/extmod/modwebsocket.c
@@ -33,15 +33,11 @@
 #include "py/obj.h"
 #include "py/runtime.h"
 #include "py/stream.h"
+#include "extmod/modwebsocket.h"
 
 #if MICROPY_PY_WEBSOCKET
 
 enum { FRAME_HEADER, FRAME_OPT, PAYLOAD };
-#define FRAME_OPCODE_MASK 0x0f
-enum {
-    FRAME_CONT, FRAME_TXT, FRAME_BIN,
-    FRAME_CLOSE = 0x8, FRAME_PING, FRAME_PONG
-};
 
 enum { BLOCKING_WRITE = 0x80 };
 
diff --git a/extmod/modwebsocket.h b/extmod/modwebsocket.h
new file mode 100644
index 0000000000..7da147561c
--- /dev/null
+++ b/extmod/modwebsocket.h
@@ -0,0 +1,5 @@
+#define FRAME_OPCODE_MASK 0x0f
+enum {
+    FRAME_CONT, FRAME_TXT, FRAME_BIN,
+    FRAME_CLOSE = 0x8, FRAME_PING, FRAME_PONG
+};