diff --git a/lib/fuse_i.h b/lib/fuse_i.h
index 2815a8a..f7924eb 100644
--- a/lib/fuse_i.h
+++ b/lib/fuse_i.h
@@ -9,6 +9,13 @@
 #include "fuse.h"
 #include "fuse_lowlevel.h"
 
+#define MIN(a, b) \
+({									\
+	typeof(a) _a = (a);						\
+	typeof(b) _b = (b);						\
+	_a < _b ? _a : _b;						\
+})
+
 struct mount_opts;
 
 struct fuse_req {
diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index 84185d5..a505552 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -2146,11 +2146,8 @@ void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 		bufsize = FUSE_MIN_READ_BUFFER;
 	}
 
-	if (se->conn.max_write > bufsize - FUSE_BUFFER_HEADER_SIZE)
-		se->conn.max_write = bufsize - FUSE_BUFFER_HEADER_SIZE;
-	if (se->conn.max_write < bufsize - FUSE_BUFFER_HEADER_SIZE)
-		bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
-	se->bufsize = bufsize;
+	se->conn.max_write = MIN(se->conn.max_write, bufsize - FUSE_BUFFER_HEADER_SIZE);
+	se->bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
 
 	if (arg->flags & FUSE_MAX_PAGES) {
 		outarg.flags |= FUSE_MAX_PAGES;