diff --git a/doc/build.py b/doc/build.py
index ebcb5a50..743f3ec6 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -54,7 +54,7 @@ def build_docs(version='dev', **kwargs):
       GENERATE_MAN      = NO
       GENERATE_RTF      = NO
       CASE_SENSE_NAMES  = NO
-      INPUT             = {0}/args.h {0}/chrono.h {0}/color.h {0}/core.h \
+      INPUT             = {0}/args.h {0}/core.h {0}/chrono.h {0}/color.h \
                           {0}/compile.h {0}/format.h {0}/os.h {0}/ostream.h \
                           {0}/printf.h {0}/ranges.h {0}/xchar.h
       QUIET             = YES