diff --git a/doxygen.cfg b/doxygen.cfg
index 5601e986..0dd78df6 100644
--- a/doxygen.cfg
+++ b/doxygen.cfg
@@ -597,6 +597,7 @@ INPUT                  = ast.h \
                          util.h \
                          ast.cpp \
                          builtins.cpp \
+                         cbackend.cpp \
                          ctx.cpp \
                          decl.cpp \
                          expr.cpp \