diff --git a/src/gc/include/private/gc_priv.h b/src/gc/include/private/gc_priv.h
index 1d96d87c8..ef724a2b9 100644
--- a/src/gc/include/private/gc_priv.h
+++ b/src/gc/include/private/gc_priv.h
@@ -876,6 +876,10 @@ struct _GC_arrays {
   word _bytes_allocd_before_gc;
 		/* Number of words allocated before this	*/
 		/* collection cycle.				*/
+  size_t _size_map[MAXOBJBYTES+1];
+    	/* Number of words to allocate for a given allocation request in */
+    	/* bytes.							 */
+
 # ifndef SEPARATE_GLOBALS
     word _bytes_allocd;
   	/* Number of words allocated during this collection cycle */
@@ -935,10 +939,6 @@ struct _GC_arrays {
     word _unmapped_bytes;
 # endif
 
-    size_t _size_map[MAXOBJBYTES+1];
-    	/* Number of words to allocate for a given allocation request in */
-    	/* bytes.							 */
-
 # ifdef STUBBORN_ALLOC
     ptr_t _sobjfreelist[MAXOBJGRANULES+1];
 # endif