diff --git a/Developers_manual/doc_tex/Developers_manual/tools.tex b/Developers_manual/doc_tex/Developers_manual/tools.tex
index 238112f890c..4751e7a57f7 100644
--- a/Developers_manual/doc_tex/Developers_manual/tools.tex
+++ b/Developers_manual/doc_tex/Developers_manual/tools.tex
@@ -140,7 +140,7 @@ The shell script
 {{\tt cgal\_create\_cmake\_script}} creates a \cgal\ cmake script, that is, a {\tt CMakeLists.txt} file,
 in the current working directory for configuring a particular \cgal\ application (such as an example, demo or test).
 
-The cmake script will have commands to make an executable from every {\tt .c}
+The cmake script will have commands to make an executable from every {\tt .C}
 and {\tt .cpp} file which contains the word {\tt main} in the directory.
 The following options are available to indicate the kind of cmake script
 to create: