diff --git a/include/simics/dmllib.h b/include/simics/dmllib.h
index ba570a22..153909fb 100644
--- a/include/simics/dmllib.h
+++ b/include/simics/dmllib.h
@@ -2286,6 +2286,15 @@ _DML_get_qname(_identity_t id, const _id_info_t *id_infos,
     return qname;
 }
 
+void
+_DML_free_qname_cache(qname_cache_t *cache)
+{
+        for (int i = 0; i < 4; i++) {
+                MM_FREE(cache->bufs[i]);
+                cache->bufs[i] = NULL;
+        }
+}
+
 static inline int
 DML_pointer_eq(lang_void *data, lang_void *match_data)
 { return data == match_data; }
diff --git a/lib/1.4/dml-builtins.dml b/lib/1.4/dml-builtins.dml
index 4c686f60..d4fcea79 100644
--- a/lib/1.4/dml-builtins.dml
+++ b/lib/1.4/dml-builtins.dml
@@ -663,7 +663,10 @@ template device {
 
     method _init() { _rec_init(); }
     method _post_init() { _rec_post_init(); }
-    method _destroy() { _rec_destroy(); }
+    method _destroy() {
+        _rec_destroy();
+        _DML_free_qname_cache();
+    }
     method init() default {}
     method post_init() default {}
     method destroy() default {}
@@ -3735,6 +3738,7 @@ template init_val is init {
 
 extern const char *_DML_get_qname(_identity_t, const _id_info_t *,
                                   dml_qname_cache_t *, const char *);
+extern void _DML_free_qname_cache(dml_qname_cache_t *);
 template _qname {
     shared method _qname() -> (const char *) {
         local _qname ref = this;