diff --git a/docs/latex/wx/keycode.tex b/docs/latex/wx/keycode.tex
index 12c2b3a8d8..5edbb51558 100644
--- a/docs/latex/wx/keycode.tex
+++ b/docs/latex/wx/keycode.tex
@@ -1,5 +1,9 @@
 \section{Keycodes}\label{keycodes}
 
+\wxheading{Include files}
+
+<wx/defs.h>
+
 Keypresses are represented by an enumerated type, wxKeyCode. The possible
 values are the ASCII character codes, plus the following: