diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index e6f83e10ed..f68b8012bb 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -59,7 +59,7 @@ void *qemu_try_memalign(size_t alignment, size_t size)
 
     g_assert(size != 0);
     g_assert(is_power_of_2(alignment));
-    ptr = _aligned_malloc(alignment, size);
+    ptr = _aligned_malloc(size, alignment);
     trace_qemu_memalign(alignment, size, ptr);
     return ptr;
 }