diff --git a/tests/libqos/malloc-pc.c b/tests/libqos/malloc-pc.c
index db1496c6679e60c5b58e3ecce65c78ee5d87b2c1..63af60ac17bf1bb35b008a91595c6b5a49a92f91 100644
--- a/tests/libqos/malloc-pc.c
+++ b/tests/libqos/malloc-pc.c
@@ -67,5 +67,8 @@ QGuestAllocator *pc_alloc_init(void)
     /* Respect PCI hole */
     s->end = MIN(ram_size, 0xE0000000);
 
+    /* clean-up */
+    g_free(fw_cfg);
+
     return &s->alloc;
 }