diff --git a/docs/latex/wx/size.tex b/docs/latex/wx/size.tex
index 22bf9c998c..0742609895 100644
--- a/docs/latex/wx/size.tex
+++ b/docs/latex/wx/size.tex
@@ -51,7 +51,7 @@ corresponding dimensions of the \arg{size}.
 
 \membersection{wxSize::IsFullySpecified}\label{wxsizeisfullyspecified}
 
-\constfunc{IsFullySpecified}{\void}
+\constfunc{bool}{IsFullySpecified}{\void}
 
 Returns \true if neither of the size object components is equal to $-1$, which
 is used as default for the size values in wxWindows (hence the predefined