diff --git a/cpputil/databuffer.h b/cpputil/databuffer.h
index 5ec0350986..e981a7c223 100644
--- a/cpputil/databuffer.h
+++ b/cpputil/databuffer.h
@@ -34,7 +34,7 @@ class DataBuffer {
 
   void Allocate(size_t l) {
     delete[] data_;
-    data_ = new uint8_t[l ? l : 1];  // Don't depend on new [0].
+    data_ = new uint8_t[l ? l : 1]();  // Don't depend on new [0].
     len_ = l;
   }