3 files changed, 3 insertions, 3 deletions
diff --git a/ext/json/ext/parser/parser.c b/ext/json/ext/parser/parser.c
index d223a86..89f9181 100644
--- a/ext/json/ext/parser/parser.c
+++ b/ext/json/ext/parser/parser.c
@@ -1645,7 +1645,7 @@ static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self)
      GET_PARSER_INIT;
  
      if (json->Vsource) {
-        rb_raise(rb_eArgError, "already initialized instance");
+        rb_raise(rb_eTypeError, "already initialized instance");
      }
      rb_scan_args(argc, argv, "11", &source, &opts);
      source = convert_encoding(StringValue(source));
diff --git a/ext/json/ext/parser/parser.h b/ext/json/ext/parser/parser.h
index 904156f..2be640e 100644
--- a/ext/json/ext/parser/parser.h
+++ b/ext/json/ext/parser/parser.h
@@ -52,7 +52,7 @@ typedef struct JSON_ParserStruct {
  
  #define GET_PARSER                          \
      GET_PARSER_INIT;                        \
-    if (!json->Vsource) rb_raise(rb_eArgError, "uninitialized instance")
+    if (!json->Vsource) rb_raise(rb_eTypeError, "uninitialized instance")
  #define GET_PARSER_INIT                     \
      JSON_Parser *json;                      \
      Data_Get_Struct(self, JSON_Parser, json)
diff --git a/ext/json/ext/parser/parser.rl b/ext/json/ext/parser/parser.rl
index eb0a6ba..44ddfa6 100644
--- a/ext/json/ext/parser/parser.rl
+++ b/ext/json/ext/parser/parser.rl
@@ -643,7 +643,7 @@ static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self)
      GET_PARSER_INIT;
  
      if (json->Vsource) {
-        rb_raise(rb_eArgError, "already initialized instance");
+        rb_raise(rb_eTypeError, "already initialized instance");
      }
      rb_scan_args(argc, argv, "11", &source, &opts);
      source = convert_encoding(StringValue(source));