Declare diag() in taplib.h

1 files changed, 1 insertions, 0 deletions

diff --git a/t/taplib.h b/t/taplib.h
index d654f26..01bda4f 100644
--- a/t/taplib.h
+++ b/t/taplib.h
@@ -2,6 +2,7 @@ void plan_tests(int n);
 void ok(int cmp, char *name);
 void pass(char *name);
 void fail(char *name);
+void diag(char *fmt, ...);
 void is_int(int got, int expect, char *name);
 void is_str(const char *got, const char *expect, char *name);
 void is_str_escape(const char *got, const char *expect, char *name);