diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c
index 84af59379d..b53c351aa4 100644
--- a/hw/core/sysbus.c
+++ b/hw/core/sysbus.c
@@ -91,6 +91,8 @@ bool sysbus_has_irq(SysBusDevice *dev, int n)
     ObjectProperty *r;
 
     r = object_property_find(OBJECT(dev), prop, NULL);
+    g_free(prop);
+
     return (r != NULL);
 }