diff --git a/src/coredump/_UCD_internal.h b/src/coredump/_UCD_internal.h
index 8b36729b..5e927775 100644
--- a/src/coredump/_UCD_internal.h
+++ b/src/coredump/_UCD_internal.h
@@ -99,4 +99,8 @@ struct UCD_info
 
 extern coredump_phdr_t * _UCD_get_elf_image(struct UCD_info *ui, unw_word_t ip);
 
+#define ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL))
+#define STRUCT_MEMBER_P(struct_p, struct_offset) ((void *) ((char*) (struct_p) + (long) (struct_offset)))
+#define STRUCT_MEMBER(member_type, struct_p, struct_offset) (*(member_type*) STRUCT_MEMBER_P ((struct_p), (struct_offset)))
+
 #endif