diff --git a/bedstead.c b/bedstead.c
index 11abd66..095d02f 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -2071,7 +2071,7 @@ static struct glyph {
  {{007,005,005,005,005,025,016,000,000}, U(1D541) }, /* double-struck J */
  {{035,025,025,026,025,025,035,000,000}, U(1D542) }, /* double-struck K */
  {{034,024,024,024,024,024,037,000,000}, U(1D543) }, /* double-struck L */
- {{021,033,025,025,025,025,035,000,000}, U(1D544) }, /* double-struck M */
+ {{021,033,025,025,025,025,027,000,000}, U(1D544) }, /* double-struck M */
  {{016,025,025,025,025,025,016,000,000}, U(1D546) }, /* double-struck O */
  {{017,024,022,011,005,005,036,000,000}, U(1D54A) }, /* double-struck S */
  {{037,012,012,012,012,012,016,000,000}, U(1D54B) }, /* double-struck T */