2 files changed, 13 insertions, 0 deletions
diff --git a/ext/json/generator/generator.c b/ext/json/generator/generator.c
index 673da3320c..1b7f036a5d 100644
--- a/ext/json/generator/generator.c
+++ b/ext/json/generator/generator.c
@@ -515,6 +515,7 @@ static size_t State_memsize(const void *ptr)
     return size;
 }
 
+#ifdef HAVE_TYPE_RB_DATA_TYPE_T
 static const rb_data_type_t JSON_Generator_State_type = {
     "JSON/Generator/State",
     {NULL, State_free, State_memsize,},
@@ -523,6 +524,7 @@ static const rb_data_type_t JSON_Generator_State_type = {
     RUBY_TYPED_FREE_IMMEDIATELY,
 #endif
 };
+#endif
 
 static JSON_Generator_State *State_allocate(void)
 {
@@ -533,7 +535,11 @@ static JSON_Generator_State *State_allocate(void)
 static VALUE cState_s_allocate(VALUE klass)
 {
     JSON_Generator_State *state = State_allocate();
+#ifdef HAVE_TYPE_RB_DATA_TYPE_T
     return TypedData_Wrap_Struct(klass, &JSON_Generator_State_type, state);
+#else
+    return Data_Wrap_Struct(klass, NULL, State_free, state);
+#endif
 }
 
 /*
diff --git a/ext/json/generator/generator.h b/ext/json/generator/generator.h
index 6cfb8ac739..a583971d9f 100644
--- a/ext/json/generator/generator.h
+++ b/ext/json/generator/generator.h
@@ -78,8 +78,13 @@ typedef struct JSON_Generator_StateStruct {
     long buffer_initial_length;
 } JSON_Generator_State;
 
+#ifdef HAVE_TYPE_RB_DATA_TYPE_T
 #define GET_STATE_TO(self, state) \
     TypedData_Get_Struct(self, JSON_Generator_State, &JSON_Generator_State_type, state)
+#else
+#define GET_STATE_TO(self, state) \
+    Data_Get_Struct(self, JSON_Generator_State, state)
+#endif
 
 #define GET_STATE(self)                       \
     JSON_Generator_State *state;              \
@@ -147,7 +152,9 @@ static VALUE cState_ascii_only_p(VALUE self);
 static VALUE cState_depth(VALUE self);
 static VALUE cState_depth_set(VALUE self, VALUE depth);
 static FBuffer *cState_prepare_buffer(VALUE self);
+#ifdef HAVE_TYPE_RB_DATA_TYPE_T
 static const rb_data_type_t JSON_Generator_State_type;
+#endif
 
 #ifndef ZALLOC
 #define ZALLOC(type) ((type *)ruby_zalloc(sizeof(type)))