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-rw-r--r--src/lisp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/lisp.h b/src/lisp.h
index f86ae5e730c..818b6e1163f 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1926,6 +1926,8 @@ extern Lisp_Object Qfloatp, Qinteger_or_floatp, Qinteger_or_float_or_marker_p;
extern Lisp_Object Qframep;
+extern void circular_list_error P_ ((Lisp_Object));
+
EXFUN (Feq, 2);
EXFUN (Fnull, 1);
EXFUN (Flistp, 1);