diff --git a/doxygen.cfg b/doxygen.cfg
index 6f9c99ef..5601e986 100644
--- a/doxygen.cfg
+++ b/doxygen.cfg
@@ -581,10 +581,12 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT                  = builtins.h \
+INPUT                  = ast.h \
+                         builtins.h \
                          ctx.h \
                          decl.h \
                          expr.h \
+                         func.h \
                          ispc.h \
                          llvmutil.h \
                          module.h \
@@ -593,10 +595,12 @@ INPUT                  = builtins.h \
                          sym.h \
                          type.h \
                          util.h \
+                         ast.cpp \
                          builtins.cpp \
                          ctx.cpp \
                          decl.cpp \
                          expr.cpp \
+                         func.cpp \
                          ispc.cpp \
                          llvmutil.cpp \
                          main.cpp \
@@ -608,7 +612,7 @@ INPUT                  = builtins.h \
                          util.cpp \
                          parse.yy \
                          lex.ll \
-                         builtins-c.c
+                         builtins/builtins.c
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is