1 files changed, 1 insertions, 0 deletions
diff --git a/regint.h b/regint.h
index cd3c2a1035..ca293edcc5 100644
--- a/regint.h
+++ b/regint.h
@@ -842,6 +842,7 @@ typedef int (*ONIGENC_INIT_PROPERTY_LIST_FUNC_TYPE)(void);
 extern int onigenc_property_list_init P_((ONIGENC_INIT_PROPERTY_LIST_FUNC_TYPE));
 
 extern size_t onig_memsize P_((const regex_t *reg));
+extern size_t onig_region_memsize P_((const struct re_registers *regs));
 
 #if defined __GNUC__ && __GNUC__ >= 4
 #pragma GCC visibility pop