diff --git a/kitty/line-buf.c b/kitty/line-buf.c
index 7971de19c..8fb0aef8a 100644
--- a/kitty/line-buf.c
+++ b/kitty/line-buf.c
@@ -14,6 +14,18 @@ clear_chars_to_space(LineBuf* linebuf, index_type y) {
     for (index_type i = 0; i < linebuf->xnum; i++) chars[i] = (1 << ATTRS_SHIFT) | 32;
 }
 
+static PyObject*
+clear(LineBuf *self) {
+#define clear_doc "Clear all lines in this LineBuf"
+    memset(self->buf, 0, self->block_size * CELL_SIZE);
+    memset(self->continued_map, 0, self->ynum * sizeof(index_type));
+    for (index_type i = 0; i < self->ynum; i++) {
+        clear_chars_to_space(self, i);
+        self->line_map[i] = i;
+    }
+    Py_RETURN_NONE;
+}
+
 static PyObject *
 new(PyTypeObject *type, PyObject *args, PyObject UNUSED *kwds) {
     LineBuf *self;
@@ -98,6 +110,7 @@ copy_old(LineBuf *self, PyObject *y);
 static PyMethodDef methods[] = {
     METHOD(line, METH_O)
     METHOD(copy_old, METH_O)
+    METHOD(clear, METH_NOARGS)
     {NULL, NULL, 0, NULL}  /* Sentinel */
 };
 
diff --git a/kitty_tests/datatypes.py b/kitty_tests/datatypes.py
index 591bd1d83..2af028314 100644
--- a/kitty_tests/datatypes.py
+++ b/kitty_tests/datatypes.py
@@ -17,6 +17,8 @@ class TestDataTypes(BaseTest):
         new = LineBuf(1, 3)
         new.copy_old(old)
         self.ae(new.line(0), old.line(1))
+        new.clear()
+        self.ae(str(new.line(0)), ' ' * new.xnum)
 
     def test_line(self):
         lb = LineBuf(2, 3)