diff --git a/tests/libqos/fw_cfg.h b/tests/libqos/fw_cfg.h
index 391669031a..60de81e863 100644
--- a/tests/libqos/fw_cfg.h
+++ b/tests/libqos/fw_cfg.h
@@ -42,4 +42,9 @@ static inline QFWCFG *pc_fw_cfg_init(QTestState *qts)
     return io_fw_cfg_init(qts, 0x510);
 }
 
+static inline void pc_fw_cfg_uninit(QFWCFG *fw_cfg)
+{
+    io_fw_cfg_uninit(fw_cfg);
+}
+
 #endif
diff --git a/tests/libqos/malloc-pc.c b/tests/libqos/malloc-pc.c
index 949a99361d..6f92ce4135 100644
--- a/tests/libqos/malloc-pc.c
+++ b/tests/libqos/malloc-pc.c
@@ -29,5 +29,5 @@ void pc_alloc_init(QGuestAllocator *s, QTestState *qts, QAllocOpts flags)
     alloc_init(s, flags, 1 << 20, MIN(ram_size, 0xE0000000), PAGE_SIZE);
 
     /* clean-up */
-    g_free(fw_cfg);
+    pc_fw_cfg_uninit(fw_cfg);
 }