diff --git a/ports/expat/build.sh b/ports/expat/build.sh
new file mode 100755
index 00000000..33d1e4e9
--- /dev/null
+++ b/ports/expat/build.sh
@@ -0,0 +1,5 @@
+#!/bin/bash ../install.sh
+
+NAME='expat'
+VERSION='2.7.1'
+DOWNLOAD_URL="https://github.com/libexpat/libexpat/releases/download/R_2_7_1/expat-$VERSION.tar.gz#0cce2e6e69b327fc607b8ff264f4b66bdf71ead55a87ffd5f3143f535f15cfa2"
diff --git a/ports/expat/patches/0001-add-banan_os-target.patch b/ports/expat/patches/0001-add-banan_os-target.patch
new file mode 100644
index 00000000..b713264b
--- /dev/null
+++ b/ports/expat/patches/0001-add-banan_os-target.patch
@@ -0,0 +1,12 @@
+diff -ruN expat-2.7.1/conftools/config.sub expat-2.7.1-banan_os/conftools/config.sub
+--- expat-2.7.1/conftools/config.sub	2022-07-27 15:26:54.000000000 +0300
++++ expat-2.7.1-banan_os/conftools/config.sub	2025-06-17 11:51:49.876848002 +0300
+@@ -1775,7 +1775,7 @@
+ 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
+ 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
+ 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
+-	     | fiwix* )
++	     | fiwix* | banan_os* )
+ 		;;
+ 	# This one is extra strict with allowed versions
+ 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)