diff --git a/ChangeLog b/ChangeLog
index 3e0fbac..5964482 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 2020-12-14  Michael Small  <smallm@sdf.org>
 
 	* ansi2text.c: include err.h to avoid implicit declartion warning
+	(main): pass missing eval argument to err()
 
 2020-12-14  Michael Small  <smallm@sdf.org>
 
diff --git a/ansi2text.c b/ansi2text.c
index 31b12a9..d72aa92 100644
--- a/ansi2text.c
+++ b/ansi2text.c
@@ -349,7 +349,7 @@ main(int argc, char **argv) {
 
 	if (*argv) {
 		if ((fdin = open(*argv, O_RDONLY)) < 0)
-			err("Error opening file: %s", *argv);
+			err(1, "Error opening file: %s", *argv);
 	}
 
 	screensize = cols * lines;