diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
index ce40ddd442..368d539bcd 100644
--- a/ext/json/parser/parser.c
+++ b/ext/json/parser/parser.c
@@ -1940,7 +1940,7 @@ static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self)
     source = convert_encoding(StringValue(source));
     StringValue(source);
     json->len = RSTRING_LEN(source);
-    json->source = RSTRING_PTR(source);;
+    json->source = RSTRING_PTR(source);
     json->Vsource = source;
     return self;
 }
diff --git a/ext/json/parser/parser.rl b/ext/json/parser/parser.rl
index 430f3c45b3..c627014593 100644
--- a/ext/json/parser/parser.rl
+++ b/ext/json/parser/parser.rl
@@ -835,7 +835,7 @@ static VALUE cParser_initialize(int argc, VALUE *argv, VALUE self)
     source = convert_encoding(StringValue(source));
     StringValue(source);
     json->len = RSTRING_LEN(source);
-    json->source = RSTRING_PTR(source);;
+    json->source = RSTRING_PTR(source);
     json->Vsource = source;
     return self;
 }