diff --git a/kitty/boss.py b/kitty/boss.py
index d6637cb8c..fda25acf5 100644
--- a/kitty/boss.py
+++ b/kitty/boss.py
@@ -265,12 +265,12 @@ class Boss:
     def restore_font_size(self):
         self.change_font_size(self.opts.font_size)
 
-    def _change_font_size(self, new_size=None):
+    def _change_font_size(self, new_size=None, on_dpi_change=False):
         if new_size is not None:
             self.current_font_size = new_size
         old_cell_width, old_cell_height = viewport_for_window()[-2:]
         windows = tuple(filter(None, self.window_id_map.values()))
-        resize_fonts(self.current_font_size)
+        resize_fonts(self.current_font_size, on_dpi_change=on_dpi_change)
         layout_sprite_map()
         prerender()
         for window in windows:
diff --git a/kitty/fonts.c b/kitty/fonts.c
index 74d5eb75c..8314b8cf1 100644
--- a/kitty/fonts.c
+++ b/kitty/fonts.c
@@ -283,7 +283,7 @@ python_send_to_gpu(unsigned int x, unsigned int y, unsigned int z, pixel* buf) {
 
 
 static inline PyObject*
-update_cell_metrics() {
+update_cell_metrics(bool on_dpi_change UNUSED) {
 #define CALL(idx, desired_height, force) { if (idx >= 0) { Font *f = fonts.fonts + idx; if ((f)->face) { if(!set_size_for_face((f)->face, desired_height, force)) return NULL; } clear_sprite_map((f)); }}
     CALL(BOX_FONT, 0, false); CALL(fonts.medium_font_idx, 0, false);
     CALL(fonts.bold_font_idx, 0, false); CALL(fonts.italic_font_idx, 0, false); CALL(fonts.bi_font_idx, 0, false);
@@ -320,8 +320,9 @@ update_cell_metrics() {
 
 static PyObject*
 set_font_size(PyObject UNUSED *m, PyObject *args) {
-    if (!PyArg_ParseTuple(args, "f", &global_state.font_sz_in_pts)) return NULL;
-    return update_cell_metrics();
+    int on_dpi_change = 0;
+    if (!PyArg_ParseTuple(args, "f|p", &global_state.font_sz_in_pts, &on_dpi_change)) return NULL;
+    return update_cell_metrics(on_dpi_change != 0);
 }
 
 static inline bool
@@ -896,7 +897,7 @@ set_font(PyObject UNUSED *m, PyObject *args) {
     }
     fonts.first_fallback_font_idx = fonts.fonts_count;
     fonts.fallback_fonts_count = 0;
-    return update_cell_metrics();
+    return update_cell_metrics(false);
 }
 
 static void
diff --git a/kitty/fonts/render.py b/kitty/fonts/render.py
index 829d35841..ba51da9ac 100644
--- a/kitty/fonts/render.py
+++ b/kitty/fonts/render.py
@@ -61,9 +61,9 @@ def set_font_family(opts=None, override_font_size=None):
     return cell_width, cell_height
 
 
-def resize_fonts(new_sz):
+def resize_fonts(new_sz, on_dpi_change=False):
     s = set_font_family.state
-    cell_width, cell_height, baseline, underline_position, underline_thickness = set_font_size(new_sz)
+    cell_width, cell_height, baseline, underline_position, underline_thickness = set_font_size(new_sz, on_dpi_change)
     set_font_family.state = FontState(
         s.family, new_sz, cell_width, cell_height, baseline,
         underline_position, underline_thickness