1 files changed, 5 insertions, 2 deletions

diff --git a/src/buffer.c b/src/buffer.c
index fec30d4f0e9..3d85d784f1c 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5875,12 +5875,15 @@ cursor's appearance is instead controlled by the variable
 `cursor-in-non-selected-windows'.  */);
 
   DEFVAR_PER_BUFFER ("line-spacing",
-                     &BVAR (current_buffer, extra_line_spacing), Qnumberp,
+                     &BVAR (current_buffer, extra_line_spacing), Qnil,
                      doc: /* Additional space to put between lines when displaying a buffer.
 The space is measured in pixels, and put below lines on graphic displays,
 see `display-graphic-p'.
 If value is a floating point number, it specifies the spacing relative
-to the default frame line height.  A value of nil means add no extra space.  */);
+to the default frame line height.
+If value is a cons cell containing a pair of floats or integers,
+it is interpreted as space above and below the line, respectively.
+A value of nil means add no extra space.  */);
 
   DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
                      &BVAR (current_buffer, cursor_in_non_selected_windows), Qnil,