1 files changed, 3 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 581835dd32b..07b2cb0b1ef 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -2760,6 +2760,9 @@ extern Lisp_Object internal_with_output_to_temp_buffer
 extern void float_to_string (char *, double);
 extern void syms_of_print (void);
 
+/* Defined in doprnt.c */
+extern size_t doprnt (char *, size_t, const char *, const char *, va_list);
+
 /* Defined in lread.c.  */
 extern Lisp_Object Qvariable_documentation, Qstandard_input;
 extern Lisp_Object Qbackquote, Qcomma, Qcomma_at, Qcomma_dot, Qfunction;