diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 15966ce9941e85b6ac26440693cb19e4ffed4078..e31f70f428dad4a80130957ee63c30824782b722 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1608,6 +1608,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
     }
     port92 = isa_create_simple(isa_bus, "port92");
     port92_init(port92, a20_line[1]);
+    g_free(a20_line);
 
     DMA_init(isa_bus, 0);