diff --git a/usr.bin/patch/inp.c b/usr.bin/patch/inp.c
index ab657bf98bcb..3aa50c688c04 100644
--- a/usr.bin/patch/inp.c
+++ b/usr.bin/patch/inp.c
@@ -1,7 +1,7 @@
 /*
  * $OpenBSD: inp.c,v 1.34 2006/03/11 19:41:30 otto Exp $
  * $DragonFly: src/usr.bin/patch/inp.c,v 1.6 2007/09/29 23:11:10 swildner Exp $
- * $NetBSD: inp.c,v 1.29 2023/06/16 23:32:37 wiz Exp $
+ * $NetBSD: inp.c,v 1.30 2023/06/16 23:36:26 wiz Exp $
  */
 
 /*
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: inp.c,v 1.29 2023/06/16 23:32:37 wiz Exp $");
+__RCSID("$NetBSD: inp.c,v 1.30 2023/06/16 23:36:26 wiz Exp $");
 
 #include <sys/types.h>
 #include <sys/file.h>
@@ -271,6 +271,7 @@ plan_a(const char *filename)
 		} else if (statfailed) {
 			fatal("can't find %s\n", filename);
 		}
+		free(lbuf);
 		free(tmp_filename1);
 		free(tmp_filename2);
 	}