diff --git a/kitty/state.c b/kitty/state.c
index 13e9119ab..3e1c220b4 100644
--- a/kitty/state.c
+++ b/kitty/state.c
@@ -609,7 +609,7 @@ os_window_regions(OSWindow *os_window, Region *central, Region *tab_bar) {
                 central->top = 0;
                 long bottom = os_window->viewport_height - tab_bar_height;
                 central->bottom = MAX(0, bottom);
-                tab_bar->top = central->bottom + 1 + margin_inner;
+                tab_bar->top = central->bottom + margin_inner;
                 break;
         }
         tab_bar->left = central->left; tab_bar->right = central->right;
@@ -832,8 +832,8 @@ wrap_region(Region *r) {
         PyStructSequence_SET_ITEM(ans, 1, PyLong_FromUnsignedLong(r->top));
         PyStructSequence_SET_ITEM(ans, 2, PyLong_FromUnsignedLong(r->right));
         PyStructSequence_SET_ITEM(ans, 3, PyLong_FromUnsignedLong(r->bottom));
-        PyStructSequence_SET_ITEM(ans, 4, PyLong_FromUnsignedLong(r->right - r->left + 1));
-        PyStructSequence_SET_ITEM(ans, 5, PyLong_FromUnsignedLong(r->bottom - r->top + 1));
+        PyStructSequence_SET_ITEM(ans, 4, PyLong_FromUnsignedLong(r->right - r->left));
+        PyStructSequence_SET_ITEM(ans, 5, PyLong_FromUnsignedLong(r->bottom - r->top));
     }
     return ans;
 }