diff --git a/src/sysprof/sysprof-memory-callgraph-view.c b/src/sysprof/sysprof-memory-callgraph-view.c
index 07abd213..ebc800f4 100644
--- a/src/sysprof/sysprof-memory-callgraph-view.c
+++ b/src/sysprof/sysprof-memory-callgraph-view.c
@@ -51,8 +51,8 @@ struct _SysprofMemoryCallgraphViewClass
 
 typedef struct _AugmentMemory
 {
-  gsize size;
-  gsize total;
+  gint64 size;
+  gint64 total;
 } AugmentMemory;
 
 G_DEFINE_FINAL_TYPE (SysprofMemoryCallgraphView, sysprof_memory_callgraph_view, SYSPROF_TYPE_CALLGRAPH_VIEW)