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-rw-r--r--include/private/gc_priv.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/private/gc_priv.h b/include/private/gc_priv.h
index 84bcc14c..dc442afb 100644
--- a/include/private/gc_priv.h
+++ b/include/private/gc_priv.h
@@ -1448,7 +1448,8 @@ struct _GC_arrays {
/* obtained scratch area. */
/* Used by GC_register_dynamic_libraries(). */
# endif
-# if defined(GC_ASSERTIONS) || (defined(KEEP_BACK_PTRS) && ALIGNMENT == 1)
+# if defined(GC_ASSERTIONS) || defined(MAKE_BACK_GRAPH) \
+ || (defined(KEEP_BACK_PTRS) && ALIGNMENT == 1)
# define SET_REAL_HEAP_BOUNDS
# define GC_least_real_heap_addr GC_arrays._least_real_heap_addr
# define GC_greatest_real_heap_addr GC_arrays._greatest_real_heap_addr