diff --git a/Kernel_23/doc_tex/Kernel_23/extensible_kernel.tex b/Kernel_23/doc_tex/Kernel_23/extensible_kernel.tex
index 85509a79329..ba98ab789b1 100644
--- a/Kernel_23/doc_tex/Kernel_23/extensible_kernel.tex
+++ b/Kernel_23/doc_tex/Kernel_23/extensible_kernel.tex
@@ -195,7 +195,7 @@ made robust by plugging it in the \ccc{Filtered_kernel}.
 
 
 \ccHtmlLinksOff
-\ccIncludeExampleCode{Kernel_23/MyKernel.C}
+\ccIncludeExampleCode{Kernel_23/MyKernel.cpp}
 \ccHtmlLinksOn