diff --git a/pstree.c b/pstree.c
index 9a84514d0..ff077aa69 100644
--- a/pstree.c
+++ b/pstree.c
@@ -20,6 +20,8 @@ void core_entry_free(CoreEntry *core)
 {
 	if (core) {
 		arch_free_thread_info(core);
+		if (core->thread_core)
+			xfree(core->thread_core->sas);
 		xfree(core->thread_core);
 		xfree(core->tc);
 		xfree(core->ids);
@@ -40,6 +42,7 @@ CoreEntry *core_entry_alloc(int alloc_thread_info, int alloc_tc)
 
 	if (alloc_thread_info) {
 		ThreadCoreEntry *thread_core;
+		ThreadSasEntry *sas;
 
 		if (arch_alloc_thread_info(core))
 			goto err;
@@ -49,6 +52,12 @@ CoreEntry *core_entry_alloc(int alloc_thread_info, int alloc_tc)
 			goto err;
 		thread_core_entry__init(thread_core);
 		core->thread_core = thread_core;
+
+		sas = xmalloc(sizeof(*sas));
+		if (!sas)
+			goto err;
+		thread_sas_entry__init(sas);
+		core->thread_core->sas = sas;
 	}
 
 	if (alloc_tc) {