3 files changed, 3 insertions, 3 deletions
diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
index 22c8167fc7..418c1c32f0 100644
--- a/ext/json/parser/parser.c
+++ b/ext/json/parser/parser.c
@@ -1613,7 +1613,7 @@ 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/parser/parser.h b/ext/json/parser/parser.h
index 5d4532b948..a344da058c 100644
--- a/ext/json/parser/parser.h
+++ b/ext/json/parser/parser.h
@@ -45,7 +45,7 @@ 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/parser/parser.rl b/ext/json/parser/parser.rl
index 680242732e..278386432b 100644
--- a/ext/json/parser/parser.rl
+++ b/ext/json/parser/parser.rl
@@ -611,7 +611,7 @@ 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));