diff --git a/libgst/oop.c b/libgst/oop.c
index ea52d4e..860cfd3 100644
--- a/libgst/oop.c
+++ b/libgst/oop.c
@@ -765,7 +765,7 @@ _gst_alloc_obj (size_t size,
   newAllocPtr = _gst_mem.eden.allocPtr + BYTES_TO_SIZE (size);
 
   if UNCOMMON (size >= _gst_mem.big_object_threshold)
-    return _gst_alloc_old_obj (size, p_oop);
+    return _gst_alloc_fixed_obj (size, p_oop);
 
   if UNCOMMON (newAllocPtr >= _gst_mem.eden.maxPtr)
     {
@@ -782,25 +782,25 @@ _gst_alloc_obj (size_t size,
 }
 
 gst_object
-_gst_alloc_old_obj (size_t size,
+_gst_alloc_fixed_obj (size_t size,
 		    OOP *p_oop)
 {
   gst_object p_instance;
 
   size = ROUNDED_BYTES (size);
 
-  /* If the object is big enough, we put it directly in oldspace.  */
-  p_instance = (gst_object) _gst_mem_alloc (_gst_mem.old, size);
+  /* If the object is big enough, we put it directly in fixedspace.  */
+  p_instance = (gst_object) _gst_mem_alloc (_gst_mem.fixed, size);
   if COMMON (p_instance)
     goto ok;
 
   _gst_global_gc (size);
-  p_instance = (gst_object) _gst_mem_alloc (_gst_mem.old, size);
+  p_instance = (gst_object) _gst_mem_alloc (_gst_mem.fixed, size);
   if COMMON (p_instance)
     goto ok;
 
   _gst_compact (0);
-  p_instance = (gst_object) _gst_mem_alloc (_gst_mem.old, size);
+  p_instance = (gst_object) _gst_mem_alloc (_gst_mem.fixed, size);
   if UNCOMMON (!p_instance)
     {
       /* !!! do something more reasonable in the future */
@@ -809,7 +809,7 @@ _gst_alloc_old_obj (size_t size,
     }
 
 ok:
-  *p_oop = alloc_oop (p_instance, F_OLD);
+  *p_oop = alloc_oop (p_instance, F_FIXED | F_OLD);
   p_instance->objSize = FROM_INT (BYTES_TO_SIZE (size));
   return p_instance;
 }
diff --git a/libgst/oop.h b/libgst/oop.h
index c20dfc3..f732d87 100644
--- a/libgst/oop.h
+++ b/libgst/oop.h
@@ -415,8 +415,8 @@ extern gst_object _gst_alloc_obj (size_t size,
 				  OOP *p_oop) 
   ATTRIBUTE_HIDDEN;
 
-/* The same, but for an oldspace object */
-extern gst_object _gst_alloc_old_obj (size_t size,
+/* The same, but for an fixedspace object */
+extern gst_object _gst_alloc_fixed_obj (size_t size,
 				      OOP *p_oop) 
   ATTRIBUTE_HIDDEN;