diff --git a/renderdoc/os/os_specific.h b/renderdoc/os/os_specific.h
index 52a150755..1a6dc82a9 100644
--- a/renderdoc/os/os_specific.h
+++ b/renderdoc/os/os_specific.h
@@ -343,7 +343,7 @@ inline bool WriteAll(const char *filename, const void *buffer, size_t size)
 template <typename T>
 bool WriteAll(const char *filename, const rdcarray<T> &buffer)
 {
-  return WriteAll(filename, buffer.data(), buffer.size());
+  return WriteAll(filename, buffer.data(), buffer.size() * sizeof(T));
 }
 
 template <typename T>