diff --git a/bedstead.c b/bedstead.c
index e628345..bb5e709 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -681,8 +681,8 @@ struct glyph {
  {{010,020,020,036,025,025,025,001,006}, 0x02a9 }, /* feng ligature */
  {{030,010,013,014,012,011,036,000,000}, 0x02aa }, /* ls ligature */
  {{030,010,017,011,012,014,037,000,000}, 0x02ab }, /* lz ligature */
- {{021,025,012,000,021,025,012,000,000}, 0x02ac }, /* bilabial percussive */
- {{037,021,021,000,037,021,021,000,000}, 0x02ad }, /* bidental percussive */
+ {{000,000,025,012,000,025,012,000,000}, 0x02ac }, /* bilabial percussive */
+ {{000,000,016,012,000,016,012,000,000}, 0x02ad }, /* bidental percussive */
 
  /* Spacing modifier letters */
  {{020,020,030,024,024,000,000,000,000}, 0x02b0 }, /* Superscript H */