diff --git a/util/memalign.c b/util/memalign.c
index 083aaae..440b8fd 100644
--- a/util/memalign.c
+++ b/util/memalign.c
@@ -78,3 +78,14 @@
             size, alignment, strerror(errno));
     abort();
 }
+
+void qemu_vfree(void *ptr)
+{
+    trace_qemu_vfree(ptr);
+#if !defined(CONFIG_POSIX_MEMALIGN) && defined(CONFIG_ALIGNED_MALLOC)
+    /* Only Windows _aligned_malloc needs a special free function */
+    _aligned_free(ptr);
+#else
+    free(ptr);
+#endif
+}
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index 91798f7..2ebfb75 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -220,12 +220,6 @@
     return ptr;
 }
 
-void qemu_vfree(void *ptr)
-{
-    trace_qemu_vfree(ptr);
-    free(ptr);
-}
-
 void qemu_anon_ram_free(void *ptr, size_t size)
 {
     trace_qemu_anon_ram_free(ptr, size);
diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index d976853..4b1ce0b 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -75,12 +75,6 @@
     return ptr;
 }
 
-void qemu_vfree(void *ptr)
-{
-    trace_qemu_vfree(ptr);
-    _aligned_free(ptr);
-}
-
 void qemu_anon_ram_free(void *ptr, size_t size)
 {
     trace_qemu_anon_ram_free(ptr, size);