minor wording cleanup
diff --git a/Doc/api/exceptions.tex b/Doc/api/exceptions.tex
index 3a51a05..5236a72 100644
--- a/Doc/api/exceptions.tex
+++ b/Doc/api/exceptions.tex
@@ -299,7 +299,7 @@
 \end{cfuncdesc}
 
 \begin{cfuncdesc}{void}{PyErr_SetInterrupt}{}
-  It simulates the effect of a
+  This function simulates the effect of a
   \constant{SIGINT}\ttindex{SIGINT} signal arriving --- the next time
   \cfunction{PyErr_CheckSignals()} is called,
   \withsubitem{(built-in exception)}{\ttindex{KeyboardInterrupt}}