diff --git a/bedstead.c b/bedstead.c
index eef2eb7..f1655d1 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -1075,6 +1075,7 @@ static struct glyph {
  {{000,024,030,037,030,024,000,000,000}, 0x21e4 }, /* arrowtableft */
  {{000,005,003,037,003,005,000,000,000}, 0x21e5 }, /* arrowtabright */
  /* Mathematical operators */
+ {{016,021,001,017,021,021,016,000,000}, 0x2202, "partialdiff" },
  {{037,021,021,021,021,021,021,021,021}, 0x220f, "product" },
  {{037,020,010,004,002,004,010,020,037}, 0x2211, "summation" },
  {{000,000,000,037,000,000,000,000,000}, 0x2212, "minus" },