diff --git a/doc/sphinxext/math_symbol_table.py b/doc/sphinxext/math_symbol_table.py
index a41b015ef2dc..e0e9bdb06cbb 100644
--- a/doc/sphinxext/math_symbol_table.py
+++ b/doc/sphinxext/math_symbol_table.py
@@ -93,7 +93,7 @@
      \hslash \vdots \blacksquare \ldots \blacktriangle \ddots \sharp
      \prime \blacktriangledown \Im \flat \backprime \Re \natural
      \circledS \P \copyright \ss \circledR \S \yen \AA \checkmark \$
-     \iiint \iint \iint \oiiint"""]
+     \iiint \iint \oiiint"""]
 ]
 
 def run(state_machine):