diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index d1f8ef2..1588883 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -720,16 +720,18 @@ struct ReadContext {
 struct WriteContext {
 
   struct Accum {
-    int64_t entries_erased = 0;
-    int64_t insert_iterations = 0;
-    int64_t entries_inserted = 0;
-    int64_t nodes_allocated = 0;
-    int64_t nodes_released = 0;
-    int64_t point_writes = 0;
-    int64_t range_writes = 0;
-    int64_t write_bytes = 0;
+    int64_t entries_erased;
+    int64_t insert_iterations;
+    int64_t entries_inserted;
+    int64_t nodes_allocated;
+    int64_t nodes_released;
+    int64_t point_writes;
+    int64_t range_writes;
+    int64_t write_bytes;
   } accum;
 
+  WriteContext() { memset(&accum, 0, sizeof(accum)); }
+
   template <class T> T *allocate(int c) {
     ++accum.nodes_allocated;
     if constexpr (std::is_same_v<T, Node0>) {