diff --git a/arena.h b/arena.h
index 7ec4c8f..c943ac8 100644
--- a/arena.h
+++ b/arena.h
@@ -36,7 +36,7 @@
 #endif
 
 #define ARENA_BACKEND_LIBC_MALLOC 0
-#define ARENA_BACKEND_LINUX_MMAP 1
+#define ARENA_BACKEND_UNIX_MMAP 1
 #define ARENA_BACKEND_WIN32_VIRTUALALLOC 2
 #define ARENA_BACKEND_WASM_HEAPBASE 3
 
@@ -166,7 +166,7 @@ void free_region(Region *r)
 {
     free(r);
 }
-#elif ARENA_BACKEND == ARENA_BACKEND_LINUX_MMAP
+#elif ARENA_BACKEND == ARENA_BACKEND_UNIX_MMAP
 #include <unistd.h>
 #include <sys/mman.h>