diff --git a/docs/src/details/libs/freetype.rst b/docs/src/details/libs/freetype.rst
index ff37ee2cc8..0e9e4b155f 100644
--- a/docs/src/details/libs/freetype.rst
+++ b/docs/src/details/libs/freetype.rst
@@ -69,6 +69,7 @@ save limited FLASH space.
    FT_CSRCS += freetype/src/base/ftdebug.c
    FT_CSRCS += freetype/src/base/ftglyph.c
    FT_CSRCS += freetype/src/base/ftinit.c
+   FT_CSRCS += freetype/src/base/ftstroke.c
    FT_CSRCS += freetype/src/cache/ftcache.c
    FT_CSRCS += freetype/src/gzip/ftgzip.c
    FT_CSRCS += freetype/src/sfnt/sfnt.c