diff --git a/usr.bin/mkimg/image.c b/usr.bin/mkimg/image.c
index c5a75c97a5cb..e92b1f278791 100644
--- a/usr.bin/mkimg/image.c
+++ b/usr.bin/mkimg/image.c
@@ -119,8 +119,12 @@ image_copyout(int fd)
 		}
 	}
 	free(buffer);
+	if (error)
+		return (error);
 	ofs = lseek(fd, 0L, SEEK_CUR);
-	ftruncate(fd, ofs);
+	if (ofs == -1)
+		return (errno);
+	error = (ftruncate(fd, ofs) == -1) ? errno : 0;
 	return (error);
 }