diff --git a/include/runtime/arena.h b/include/runtime/arena.h
index c9c55e08a..220f8030b 100644
--- a/include/runtime/arena.h
+++ b/include/runtime/arena.h
@@ -14,6 +14,15 @@ class arena {
 public:
   arena(char id) : allocation_semispace_id(id) {}
   void *kore_arena_alloc(size_t requested);
+  
+  // Returns the address of the first byte that belongs in the given arena.
+  // Returns 0 if nothing has been allocated ever in that arena.
+  char *arena_start_ptr() const;
+
+  // Returns a pointer to a location holding the address of last allocated
+  // byte in the given arena plus 1.
+  // This address is 0 if nothing has been allocated ever in that arena.
+  char **arena_end_ptr();
 
   // return the total number of allocatable bytes currently in the arena in its
   // active semispace.
@@ -55,12 +64,6 @@ class arena {
   size_t num_blocks;
   size_t num_collection_blocks;
   char allocation_semispace_id;
-  //
-  //	These functions need to be friends because they are called from LLVM code.
-  //
-  friend char *arena_start_ptr(const arena *arena);
-  friend char **arena_end_ptr(arena *arena);
-  //friend bool youngspace_almost_full(size_t threshold);
 };
 
 using memory_block_header = struct {
@@ -112,14 +115,6 @@ inline void
   return result;
 }
 
-// Returns the address of the first byte that belongs in the given arena.
-// Returns 0 if nothing has been allocated ever in that arena.
-char *arena_start_ptr(const arena *);
-
-// Returns a pointer to a location holding the address of last allocated
-// byte in the given arena plus 1.
-// This address is 0 if nothing has been allocated ever in that arena.
-char **arena_end_ptr(arena *);
 
 // Given a starting pointer to an address allocated in an arena and a size in
 // bytes, this function returns a pointer to an address allocated in the
diff --git a/runtime/alloc/arena.cpp b/runtime/alloc/arena.cpp
index f22928df6..0342bf0d0 100644
--- a/runtime/alloc/arena.cpp
+++ b/runtime/alloc/arena.cpp
@@ -189,13 +189,14 @@ __attribute__((always_inline)) void arena::arena_clear() {
 }
 
 __attribute__((always_inline)) char *
-arena_start_ptr(const arena *arena) {
-  return arena->first_block ? arena->first_block + sizeof(memory_block_header)
-                            : nullptr;
+arena::arena_start_ptr() const {
+  return first_block ? first_block + sizeof(memory_block_header)
+                     : nullptr;
 }
 
-__attribute__((always_inline)) char **arena_end_ptr(arena *arena) {
-  return &arena->block;
+__attribute__((always_inline)) char **
+arena::arena_end_ptr() {
+  return █
 }
 
 char *move_ptr(char *ptr, size_t size, char const *arena_end_ptr) {
diff --git a/runtime/lto/alloc.cpp b/runtime/lto/alloc.cpp
index 289e55a2f..0cd79a3f8 100644
--- a/runtime/lto/alloc.cpp
+++ b/runtime/lto/alloc.cpp
@@ -16,19 +16,19 @@ REGISTER_ARENA(oldspace, OLDSPACE_ID);
 REGISTER_ARENA(alwaysgcspace, ALWAYSGCSPACE_ID);
 
 char *youngspace_ptr() {
-  return arena_start_ptr(&youngspace);
+  return youngspace.arena_start_ptr();
 }
 
 char *oldspace_ptr() {
-  return arena_start_ptr(&oldspace);
+  return oldspace.arena_start_ptr();
 }
 
 char **young_alloc_ptr() {
-  return arena_end_ptr(&youngspace);
+  return youngspace.arena_end_ptr();
 }
 
 char **old_alloc_ptr() {
-  return arena_end_ptr(&oldspace);
+  return oldspace.arena_end_ptr();
 }
 
 char youngspace_collection_id() {
@@ -85,7 +85,7 @@ kore_resize_last_alloc(void *oldptr, size_t newrequest, size_t last_size) {
   newrequest = (newrequest + 7) & ~7;
   last_size = (last_size + 7) & ~7;
 
-  if (oldptr != *arena_end_ptr(&youngspace) - last_size) {
+  if (oldptr != *(youngspace.arena_end_ptr()) - last_size) {
     MEM_LOG(
         "May only reallocate last allocation. Tried to reallocate %p to %zd\n",
         oldptr, newrequest);