diff -ruN libxshmfence-1.3.3/src/xshmfence_futex.h libxshmfence-1.3.3-banan_os/src/xshmfence_futex.h
--- libxshmfence-1.3.3/src/xshmfence_futex.h	2024-12-14 04:05:01.000000000 +0200
+++ libxshmfence-1.3.3-banan_os/src/xshmfence_futex.h	2026-07-05 09:37:56.106400833 +0300
@@ -45,6 +45,18 @@
 	return sys_futex(addr, UMTX_OP_WAIT_UINT, value);
 }
 
+#elif defined(__banan_os__)
+
+#include <sys/futex.h>
+
+static inline int futex_wake(int32_t *addr) {
+	return futex(FUTEX_WAKE, (const uint32_t*)addr, INT_MAX, nullptr);
+}
+
+static inline int futex_wait(int32_t *addr, int32_t value) {
+	return futex(FUTEX_WAIT, (const uint32_t*)addr, value, nullptr);
+}
+
 #else
 
 #include <stdint.h>