diff --git a/src/bun.js/bindings/c-bindings.cpp b/src/bun.js/bindings/c-bindings.cpp
index b3db3e7000..cfd507e78f 100644
--- a/src/bun.js/bindings/c-bindings.cpp
+++ b/src/bun.js/bindings/c-bindings.cpp
@@ -200,15 +200,19 @@ extern "C" void windows_enable_stdio_inheritance()
 #define CLOSE_RANGE_CLOEXEC (1U << 2)
 #endif
 
+#ifndef __NR_close_range
+// True for architectures we support:
+// - arch/arm64/include/asm/unistd32.h
+// - include/uapi/asm-generic/unistd.h
+// Not true for:
+// - DEC Alpha AXP (Alpha architecture)
+#define __NR_close_range 436
+#endif
+
 // close_range is glibc > 2.33, which is very new
 extern "C" ssize_t bun_close_range(unsigned int start, unsigned int end, unsigned int flags)
 {
-// https://github.com/oven-sh/bun/issues/9669
-#ifdef __NR_close_range
     return syscall(__NR_close_range, start, end, flags);
-#else
-    return ENOSYS;
-#endif
 }
 
 static void unset_cloexec(int fd)