diff --git a/x11-misc/xbatt/files/xbatt-1.2.1-clang16.patch b/x11-misc/xbatt/files/xbatt-1.2.1-clang16.patch
new file mode 100644
index 0000000000000..9a7c03157738f
--- /dev/null
+++ b/x11-misc/xbatt/files/xbatt-1.2.1-clang16.patch
@@ -0,0 +1,8 @@
+https://bugs.gentoo.org/870412
+--- a/xbatt.c
++++ b/xbatt.c
+@@ -223,3 +223,3 @@
+ 
+-main(
++int main(
+   int	argc,
diff --git a/x11-misc/xbatt/xbatt-1.3_rc1-r1.ebuild b/x11-misc/xbatt/xbatt-1.3_rc1-r1.ebuild
index 1c3072e729f7c..460d865a6a045 100644
--- a/x11-misc/xbatt/xbatt-1.3_rc1-r1.ebuild
+++ b/x11-misc/xbatt/xbatt-1.3_rc1-r1.ebuild
@@ -32,6 +32,7 @@ BDEPEND="
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-1.2.1-implicits.patch
+	"${FILESDIR}"/${PN}-1.2.1-clang16.patch
 )
 
 src_configure() {