diff --git a/external/parse.h b/external/parse.h
index 08840c6431effd..c47ccb8d991616 100644
--- a/external/parse.h
+++ b/external/parse.h
@@ -74,6 +74,10 @@ typedef struct rb_parser_config_struct {
     // VALUE rb_syntax_error_append(VALUE, VALUE, int, int, rb_encoding*, const char*, va_list);
     VALUE (*syntax_error_append)(VALUE, VALUE, int, int, const void*, const char*, va_list);
 
+    /* Re */
+    VALUE (*reg_compile)(VALUE str, int options, const char *sourcefile, int sourceline);
+    VALUE (*reg_check_preprocess)(VALUE str);
+
 } rb_parser_config_t;
 
 typedef struct parser_params rb_parser_t;
diff --git a/parse.y b/parse.y
index 989de39e84c713..ab289e3d0e8087 100644
--- a/parse.y
+++ b/parse.y
@@ -43,7 +43,6 @@ struct lex_context;
 #include "internal/compilers.h"
 #include "internal/encoding.h"
 #include "internal/imemo.h"
-#include "internal/re.h"
 #include "internal/symbol.h"
 #include "internal/variable.h"
 #include "probes.h"
@@ -63,6 +62,7 @@ struct lex_context;
 #include "internal/hash.h"
 #include "internal/io.h"
 #include "internal/rational.h"
+#include "internal/re.h"
 #include "internal/thread.h"
 
 #endif
@@ -154,6 +154,8 @@ RBIMPL_WARNING_POP()
 #define rb_builtin_class_name p->config.builtin_class_name
 #define rb_syntax_error_append p->config.syntax_error_append
 
+#define rb_reg_compile          p->config.reg_compile
+#define rb_reg_check_preprocess p->config.reg_check_preprocess
 
 #endif
 
diff --git a/ruby_parser.c b/ruby_parser.c
index 84390d0dae6511..9b4583353e1e75 100644
--- a/ruby_parser.c
+++ b/ruby_parser.c
@@ -9,6 +9,7 @@
 #include "internal/io.h"
 #include "internal/parse.h"
 #include "internal/rational.h"
+#include "internal/re.h"
 #include "internal/ruby_parser.h"
 #include "internal/string.h"
 #include "internal/thread.h"
@@ -166,6 +167,9 @@ rb_parser_config_initialize(rb_parser_config_t *config)
 
     config->builtin_class_name = rb_builtin_class_name;
     config->syntax_error_append = syntax_error_append;
+
+    config->reg_compile = rb_reg_compile;
+    config->reg_check_preprocess = rb_reg_check_preprocess;
 }
 
 VALUE