diff --git a/kitty/data-types.c b/kitty/data-types.c
index 9400673ab..4dece45b1 100644
--- a/kitty/data-types.c
+++ b/kitty/data-types.c
@@ -98,6 +98,18 @@ static struct PyModuleDef module = {
 #include <termios.h>
 
 extern bool add_module_gl_constants(PyObject*);
+extern int init_LineBuf(PyObject *);
+extern int init_HistoryBuf(PyObject *);
+extern int init_Cursor(PyObject *);
+extern int init_Timers(PyObject *);
+extern int init_ChildMonitor(PyObject *);
+extern int init_Line(PyObject *);
+extern int init_ColorProfile(PyObject *);
+extern int init_Screen(PyObject *);
+extern int init_Face(PyObject *);
+extern int init_Window(PyObject *);
+extern bool init_freetype_library(PyObject*);
+extern bool init_fontconfig_library(PyObject*);
 
 EXPORTED PyMODINIT_FUNC
 PyInit_fast_data_types(void) {
diff --git a/kitty/data-types.h b/kitty/data-types.h
index 296602678..9002550f9 100644
--- a/kitty/data-types.h
+++ b/kitty/data-types.h
@@ -291,16 +291,6 @@ Cursor* alloc_cursor();
 LineBuf* alloc_linebuf(unsigned int, unsigned int);
 HistoryBuf* alloc_historybuf(unsigned int, unsigned int);
 ColorProfile* alloc_color_profile();
-int init_LineBuf(PyObject *);
-int init_HistoryBuf(PyObject *);
-int init_Cursor(PyObject *);
-int init_Timers(PyObject *);
-int init_ChildMonitor(PyObject *);
-int init_Line(PyObject *);
-int init_ColorProfile(PyObject *);
-int init_Screen(PyObject *);
-int init_Face(PyObject *);
-int init_Window(PyObject *);
 PyObject* create_256_color_table();
 void parse_worker(Screen *screen, PyObject *dump_callback);
 void parse_worker_dump(Screen *screen, PyObject *dump_callback);
@@ -413,6 +403,4 @@ DECLARE_CH_SCREEN_HANDLER(tab)
 DECLARE_CH_SCREEN_HANDLER(linefeed)
 DECLARE_CH_SCREEN_HANDLER(carriage_return)
 
-bool init_freetype_library(PyObject*);
-bool init_fontconfig_library(PyObject*);
 PyObject *get_fontconfig_font(PyObject *self, PyObject *args);