diff --git a/math/readstat/Makefile b/math/readstat/Makefile
index ed2be537b7972..bfdce5912113c 100644
--- a/math/readstat/Makefile
+++ b/math/readstat/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	readstat
 DISTVERSION=	1.1.8
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	math kde
 MASTER_SITES=	https://github.com/WizardMac/ReadStat/releases/download/v${DISTVERSION}/
 
diff --git a/math/readstat/files/patch-src_readstat__bits.c b/math/readstat/files/patch-src_readstat__bits.c
new file mode 100644
index 0000000000000..5ccc9f5e1147e
--- /dev/null
+++ b/math/readstat/files/patch-src_readstat__bits.c
@@ -0,0 +1,11 @@
+--- src/readstat_bits.c.orig	2023-03-16 22:38:26 UTC
++++ src/readstat_bits.c
+@@ -8,7 +8,7 @@
+ 
+ #include "readstat_bits.h"
+ 
+-int machine_is_little_endian() {
++int machine_is_little_endian(void) {
+     int test_byte_order = 1;
+     return ((char *)&test_byte_order)[0];
+ }