1 files changed, 3 insertions, 1 deletions

diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index 84c0c9d113d..df557e7edb4 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -526,6 +526,7 @@ scan_c_file (filename, mode)
  Looks for
   (defun NAME ARGS DOCSTRING ...)
   (defmacro NAME ARGS DOCSTRING ...)
+  (defsubst NAME ARGS DOCSTRING ...)
   (autoload (quote NAME) FILE DOCSTRING ...)
   (defvar NAME VALUE DOCSTRING)
   (defconst NAME VALUE DOCSTRING)
@@ -675,7 +676,8 @@ scan_lisp_file (filename, mode)
       read_lisp_symbol (infile, buffer);
 
       if (! strcmp (buffer, "defun")
-          || ! strcmp (buffer, "defmacro"))
+          || ! strcmp (buffer, "defmacro")
+          || ! strcmp (buffer, "defsubst"))
         {
           type = 'F';
           read_lisp_symbol (infile, buffer);