diff --git a/bsd-user/mmap.c b/bsd-user/mmap.c
index 5d6cffc..1f4d4a3 100644
--- a/bsd-user/mmap.c
+++ b/bsd-user/mmap.c
@@ -74,7 +74,7 @@ void mmap_unlock(void)
 }
 #endif

-void *qemu_vmalloc(size_t size)
+static void *qemu_vmalloc(size_t size)
 {
     void *p;
     mmap_lock();