diff --git a/doc/ref/api-languages.texi b/doc/ref/api-languages.texi
index fb42987d9..dd4f223df 100644
--- a/doc/ref/api-languages.texi
+++ b/doc/ref/api-languages.texi
@@ -229,7 +229,7 @@ Here are correct versions of the above examples:
 This problem has a mirror-image case in Elisp:
 
 @example
-(deffn my-falsep (x)
+(defun my-falsep (x)
   (if (eq x nil)
       t
       nil))