diff --git a/hw/usb/desc-msos.c b/hw/usb/desc-msos.c
index 334d1aea8dd929ef7353e89e11d3e998acef465a..32c3600df8479f576496fe00d4fc99d0fc3eb03e 100644
--- a/hw/usb/desc-msos.c
+++ b/hw/usb/desc-msos.c
@@ -231,7 +231,7 @@ int usb_desc_msos(const USBDesc *desc,  USBPacket *p,
         length = len;
     }
     memcpy(dest, buf, length);
-    free(buf);
+    g_free(buf);
 
     p->actual_length = length;
     return 0;