diff --git a/src/mem.cpp b/src/mem.cpp
index 31ee3bc..da70f29 100644
--- a/src/mem.cpp
+++ b/src/mem.cpp
@@ -191,17 +191,6 @@ T *arena_push_nozero(Arena *arena)
   return arena_push_array_nozero<T>(arena, 1);
 }
 
-internal
-u8 *arena_push_contiguous(Arena *arena, u64 size)
-{
-  b32 restore = arena->grow;
-  arena->grow = 0;
-  void *mem = arena_push_impl(arena, size);
-  arena->grow = restore;
-  if (!mem) fprintf(stderr, "Failed to allocate %lu bytes of contiguous memory\n", size);
-  return (u8 *)mem;
-}
-
 internal
 u64 arena_pos(Arena *arena)
 {
diff --git a/src/rntuple.cpp b/src/rntuple.cpp
index f7c5db3..36f7f93 100644
--- a/src/rntuple.cpp
+++ b/src/rntuple.cpp
@@ -21,14 +21,14 @@ ROOT::Experimental::RNTupleDescriptor create_descriptor(Arena *arena, RMicroFile
   const RNTuple_Anchor &anchor = info.anchor;
   
   // Read compressed header+footer
-  u8 *header_zip = arena_push_contiguous(scratch.arena, anchor.fNBytesHeader);
-  u8 *footer_zip = arena_push_contiguous(scratch.arena, anchor.fNBytesFooter);
+  u8 *header_zip = arena_push_array_nozero<u8>(scratch.arena, anchor.fNBytesHeader);
+  u8 *footer_zip = arena_push_array_nozero<u8>(scratch.arena, anchor.fNBytesFooter);
   reader.ReadBuffer(header_zip, anchor.fNBytesHeader, anchor.fSeekHeader);
   reader.ReadBuffer(footer_zip, anchor.fNBytesFooter, anchor.fSeekFooter);
 
   // Decompress header+footer
-  u8 *header = arena_push_contiguous(scratch.arena, anchor.fLenHeader);
-  u8 *footer = arena_push_contiguous(scratch.arena, anchor.fLenFooter);
+  u8 *header = arena_push_array_nozero<u8>(scratch.arena, anchor.fLenHeader);
+  u8 *footer = arena_push_array_nozero<u8>(scratch.arena, anchor.fLenFooter);
   RNTupleDecompressor::Unzip(header_zip, anchor.fNBytesHeader, anchor.fLenHeader, header);
   RNTupleDecompressor::Unzip(footer_zip, anchor.fNBytesFooter, anchor.fLenFooter, footer);
   
@@ -44,12 +44,12 @@ ROOT::Experimental::RNTupleDescriptor create_descriptor(Arena *arena, RMicroFile
     // Read page list
     u64 page_list_zip_size = cgdesc.GetPageListLocator().fBytesOnStorage;
     u64 page_list_seek = cgdesc.GetPageListLocator().GetPosition<u64>();
-    u8 *page_list_zip = arena_push_contiguous(scratch.arena, page_list_zip_size);
+    u8 *page_list_zip = arena_push_array_nozero<u8>(scratch.arena, page_list_zip_size);
     reader.ReadBuffer(page_list_zip, page_list_zip_size, page_list_seek);
 
     // Decompress page list
     u64 page_list_len = cgdesc.GetPageListLength();
-    u8 *page_list = arena_push_contiguous(scratch.arena, page_list_len);
+    u8 *page_list = arena_push_array_nozero<u8>(scratch.arena, page_list_len);
     RNTupleDecompressor::Unzip(page_list_zip, page_list_zip_size, page_list_len, page_list);
 
     // Deserialize page list