diff --git a/doc/generic/pgf/pgfmanual-en-gd-overview.tex b/doc/generic/pgf/pgfmanual-en-gd-overview.tex
index 190451b14..619075e41 100644
--- a/doc/generic/pgf/pgfmanual-en-gd-overview.tex
+++ b/doc/generic/pgf/pgfmanual-en-gd-overview.tex
@@ -153,7 +153,7 @@ \subsection{Using the Graph Drawing System}
 
 \subsection{Extending the Graph Drawing System}
 
-The graph drawing engine is also intended to make is (relatively) easy to
+The graph drawing engine is also intended to make it (relatively) easy to
 implement new graph drawing algorithms. These algorithms can either be
 implemented in the Lua programming language (which is \emph{much} easier to
 program than \TeX\ itself) or in C/C++ (but at a great cost regarding