diff --git a/Modules/_tracemalloc.c b/Modules/_tracemalloc.c
index 90498fb7a7897d..ba0eb738abcbc5 100644
--- a/Modules/_tracemalloc.c
+++ b/Modules/_tracemalloc.c
@@ -1241,6 +1241,9 @@ tracemalloc_copy_domain(_Py_hashtable_t *domains,
     _Py_hashtable_t *traces = (_Py_hashtable_t *)value;
 
     _Py_hashtable_t *traces2 = tracemalloc_copy_traces(traces);
+    if (traces2 == NULL) {
+        return -1;
+    }
     if (_Py_hashtable_set(domains2, TO_PTR(domain), traces2) < 0) {
         _Py_hashtable_destroy(traces2);
         return -1;