diff --git a/constant.h b/constant.h
index 3f1418df17..610bdf1dfe 100644
--- a/constant.h
+++ b/constant.h
@@ -39,12 +39,15 @@ VALUE rb_mod_private_constant(int argc, const VALUE *argv, VALUE obj);
 VALUE rb_mod_public_constant(int argc, const VALUE *argv, VALUE obj);
 VALUE rb_mod_deprecate_constant(int argc, const VALUE *argv, VALUE obj);
 void rb_free_const_table(struct rb_id_table *tbl);
+VALUE rb_const_source_location(VALUE, ID);
+
+MJIT_SYMBOL_EXPORT_BEGIN
+int rb_autoloading_value(VALUE mod, ID id, VALUE *value, rb_const_flag_t *flag);
+rb_const_entry_t *rb_const_lookup(VALUE klass, ID id);
 VALUE rb_public_const_get_at(VALUE klass, ID id);
 VALUE rb_public_const_get_from(VALUE klass, ID id);
 int rb_public_const_defined_from(VALUE klass, ID id);
-rb_const_entry_t *rb_const_lookup(VALUE klass, ID id);
-int rb_autoloading_value(VALUE mod, ID id, VALUE *value, rb_const_flag_t *flag);
-VALUE rb_const_source_location(VALUE, ID);
 VALUE rb_const_source_location_at(VALUE, ID);
+MJIT_SYMBOL_EXPORT_END
 
 #endif /* CONSTANT_H */
diff --git a/internal/variable.h b/internal/variable.h
index 1de31f6b92..1cdc06e08d 100644
--- a/internal/variable.h
+++ b/internal/variable.h
@@ -10,29 +10,24 @@
  *             file COPYING are met.  Consult the file for details.
  */
 
+#include "ruby/config.h"
+#include <stddef.h>             /* for size_t */
+#include "constant.h"           /* for rb_const_entry_t */
+#include "internal/stdbool.h"   /* for bool */
+#include "ruby/ruby.h"          /* for VALUE */
+
 /* global variable */
 
+#define ROBJECT_TRANSIENT_FLAG    FL_USER13
+
+struct rb_global_variable;      /* defined in variable.c */
+
 struct rb_global_entry {
     struct rb_global_variable *var;
     ID id;
 };
 
-struct rb_global_entry *rb_global_entry(ID);
-VALUE rb_gvar_get(struct rb_global_entry *);
-VALUE rb_gvar_set(struct rb_global_entry *, VALUE);
-VALUE rb_gvar_defined(struct rb_global_entry *);
-
 /* variable.c */
-#if USE_TRANSIENT_HEAP
-#define ROBJECT_TRANSIENT_FLAG    FL_USER13
-#define ROBJ_TRANSIENT_P(obj)     FL_TEST_RAW((obj), ROBJECT_TRANSIENT_FLAG)
-#define ROBJ_TRANSIENT_SET(obj)   FL_SET_RAW((obj), ROBJECT_TRANSIENT_FLAG)
-#define ROBJ_TRANSIENT_UNSET(obj) FL_UNSET_RAW((obj), ROBJECT_TRANSIENT_FLAG)
-#else
-#define ROBJ_TRANSIENT_P(obj)     0
-#define ROBJ_TRANSIENT_SET(obj)   ((void)0)
-#define ROBJ_TRANSIENT_UNSET(obj) ((void)0)
-#endif
 void rb_gc_mark_global_tbl(void);
 size_t rb_generic_ivar_memsize(VALUE);
 VALUE rb_search_class_path(VALUE);
@@ -46,6 +41,9 @@ rb_gvar_getter_t *rb_gvar_getter_function_of(const struct rb_global_entry *);
 rb_gvar_setter_t *rb_gvar_setter_function_of(const struct rb_global_entry *);
 bool rb_gvar_is_traced(const struct rb_global_entry *);
 void rb_gvar_readonly_setter(VALUE v, ID id, VALUE *_);
+static inline bool ROBJ_TRANSIENT_P(VALUE obj);
+static inline void ROBJ_TRANSIENT_SET(VALUE obj);
+static inline void ROBJ_TRANSIENT_UNSET(VALUE obj);
 
 RUBY_SYMBOL_EXPORT_BEGIN
 /* variable.c (export) */
@@ -56,4 +54,39 @@ int rb_class_ivar_set(VALUE klass, ID vid, VALUE value);
 void rb_iv_tbl_copy(VALUE dst, VALUE src);
 RUBY_SYMBOL_EXPORT_END
 
+MJIT_SYMBOL_EXPORT_BEGIN
+struct rb_global_entry *rb_global_entry(ID);
+VALUE rb_gvar_get(struct rb_global_entry *);
+VALUE rb_gvar_set(struct rb_global_entry *, VALUE);
+VALUE rb_gvar_defined(struct rb_global_entry *);
+struct st_table *rb_ivar_generic_ivtbl(void);
+void rb_const_warn_if_deprecated(const rb_const_entry_t *, VALUE, ID);
+MJIT_SYMBOL_EXPORT_END
+
+static inline bool
+ROBJ_TRANSIENT_P(VALUE obj)
+{
+#if USE_TRANSIENT_HEAP
+    return FL_TEST_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+#else
+    return false;
+#endif
+}
+
+static inline void
+ROBJ_TRANSIENT_SET(VALUE obj)
+{
+#if USE_TRANSIENT_HEAP
+    FL_SET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+#endif
+}
+
+static inline void
+ROBJ_TRANSIENT_UNSET(VALUE obj)
+{
+#if USE_TRANSIENT_HEAP
+    FL_UNSET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
+#endif
+}
+
 #endif /* INTERNAL_VARIABLE_H */