diff --git a/lang/seed7/Makefile b/lang/seed7/Makefile
index 6218f1fa22b1..121483d6e57d 100644
--- a/lang/seed7/Makefile
+++ b/lang/seed7/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	seed7
-DISTVERSION=	05_20230305
+DISTVERSION=	05_20230529
 PORTREVISION=	0
 CATEGORIES=	lang
 MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}/${DISTNAME}/
diff --git a/lang/seed7/distinfo b/lang/seed7/distinfo
index 5c035ea2a7de..f14e36baa1f5 100644
--- a/lang/seed7/distinfo
+++ b/lang/seed7/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1680168651
-SHA256 (seed7_05_20230305.tgz) = 429af725ca54ce98a8c56a04e30c93e1620996ff5c8293ab1d4a6d72f955f299
-SIZE (seed7_05_20230305.tgz) = 3907256
+TIMESTAMP = 1685534550
+SHA256 (seed7_05_20230529.tgz) = 09ba3604bde9b1cbc06fbafa9917269fe1bcf927479f21ee789c26471a982ed1
+SIZE (seed7_05_20230529.tgz) = 3966570
diff --git a/lang/seed7/files/patch-9654fd6 b/lang/seed7/files/patch-9654fd6
new file mode 100644
index 000000000000..1138575a9cc1
--- /dev/null
+++ b/lang/seed7/files/patch-9654fd6
@@ -0,0 +1,35 @@
+From 9654fd670035297f239284013f38a3032e5a392c Mon Sep 17 00:00:00 2001
+From: Thomas Mertes <thomas.mertes@gmx.at>
+Date: Thu, 1 Jun 2023 12:46:17 +0200
+Subject: [PATCH] Fix issue with clang compiling chkarr
+
+---
+ ../lib/comp/arr_act.s7i | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git ../lib/comp/arr_act.s7i.orig ../lib/comp/arr_act.s7i
+index b393c9c2..206e4a0d 100644
+--- ../lib/comp/arr_act.s7i.orig
++++ ../lib/comp/arr_act.s7i
+@@ -448,7 +448,9 @@ const proc: process_const_arr_idx (in reference: function, in reference: anArray
+       index_value := getValue(evaluatedParam, integer);
+       if index_value < arrayMinIdx(anArray) or index_value > arrayMaxIdx(anArray) then
+         warning(DOES_RAISE, "INDEX_ERROR", c_expr);
+-        c_expr.expr &:= intRaiseError("INDEX_ERROR");
++        c_expr.expr &:= "(";
++        c_expr.expr &:= type_name(resultType(getType(function)));
++        c_expr.expr &:= ")(raiseError(INDEX_ERROR), 0)";
+       else
+         c_expr.expr &:= "arr[";
+         c_expr.expr &:= str(const_table[anArray]);
+@@ -462,7 +464,9 @@ const proc: process_const_arr_idx (in reference: function, in reference: anArray
+       if indexRange.maxValue < arrayMinIdx(anArray) or
+           indexRange.minValue > arrayMaxIdx(anArray) then
+         warning(DOES_RAISE, "INDEX_ERROR", c_expr);
+-        c_expr.expr &:= intRaiseError("INDEX_ERROR");
++        c_expr.expr &:= "(";
++        c_expr.expr &:= type_name(resultType(getType(function)));
++        c_expr.expr &:= ")(raiseError(INDEX_ERROR), 0)";
+       else
+         c_expr.expr &:= "arr[";
+         c_expr.expr &:= str(const_table[anArray]);
diff --git a/lang/seed7/pkg-plist b/lang/seed7/pkg-plist
index 286beb7cad8e..023eaf42b3d5 100644
--- a/lang/seed7/pkg-plist
+++ b/lang/seed7/pkg-plist
@@ -11,6 +11,7 @@ lib/seed7/bin/seed7_05.a
 lib/seed7/lib/aes.s7i
 lib/seed7/lib/ar.s7i
 lib/seed7/lib/arc4.s7i
+lib/seed7/lib/archive_base.s7i
 lib/seed7/lib/array.s7i
 lib/seed7/lib/asn1.s7i
 lib/seed7/lib/bigfile.s7i