diff --git a/runtime/parallelIO/bonsaiIO.h b/runtime/parallelIO/bonsaiIO.h
index 92852a4..f8c5537 100644
--- a/runtime/parallelIO/bonsaiIO.h
+++ b/runtime/parallelIO/bonsaiIO.h
@@ -59,7 +59,7 @@ struct BonsaiIO
       return true;
     }
 
-  template<typename T, typename ID_t>
+  template<typename ID_t, typename T>
     bool readAttribute(const std::string &attributeName, const std::vector<ID_t> &IDList, std::vector<T> &attributeData)
     {
       assert(isFileOpenedForRead());