diff --git a/v8js_class.cc b/v8js_class.cc
index aebe0d2..0693f6a 100644
--- a/v8js_class.cc
+++ b/v8js_class.cc
@@ -638,7 +638,6 @@ static void v8js_execute_script(zval *this_ptr, v8js_script *res, long flags, lo
 static PHP_METHOD(V8Js, executeString)
 {
 	zend_string *str = NULL, *identifier = NULL;
-	int str_len = 0, identifier_len = 0;
 	long flags = V8JS_FLAG_NONE, time_limit = 0, memory_limit = 0;
 	v8js_script *res = NULL;
 
@@ -671,7 +670,6 @@ static PHP_METHOD(V8Js, executeString)
 static PHP_METHOD(V8Js, compileString)
 {
 	zend_string *str = NULL, *identifier = NULL;
-	int str_len = 0, identifier_len = 0;
 	v8js_script *res = NULL;
 
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "S|S", &str, &identifier) == FAILURE) {
@@ -686,7 +684,6 @@ static PHP_METHOD(V8Js, compileString)
 		ctx = Z_V8JS_CTX_OBJ_P(getThis());
 		ctx->script_objects.push_back(res);
 	}
-	return;
 }
 
 /* }}} */
@@ -716,7 +713,6 @@ static PHP_METHOD(V8Js, executeScript)
 static PHP_METHOD(V8Js, checkString)
 {
 	zend_string *str = NULL;
-	int str_len = 0;
 	zend_string *identifier = zend_string_init("V8Js::checkString()", 19, 0);
 
 	v8js_script *res = NULL;
diff --git a/v8js_object_export.cc b/v8js_object_export.cc
index 6e0b55c..5a99317 100644
--- a/v8js_object_export.cc
+++ b/v8js_object_export.cc
@@ -39,10 +39,11 @@ static void v8js_call_php_func(zend_object *object, zend_function *method_ptr, v
 	v8::Handle<v8::Value> return_value = V8JS_NULL;
 	zend_fcall_info fci;
 	zend_fcall_info_cache fcc;
-	zval fname, retval, **argv = NULL;
+	zval fname, retval;
 	unsigned int argc = info.Length(), min_num_args = 0, max_num_args = 0;
 	char *error;
-	int error_len, i;
+	int error_len;
+	unsigned int i;
 
 	v8js_ctx *ctx = (v8js_ctx *) isolate->GetData(0);
 
@@ -779,7 +780,7 @@ static v8::Handle<v8::Object> v8js_wrap_object(v8::Isolate *isolate, zend_class_
 				bool has_array_access = false;
 				bool has_countable = false;
 
-				for (int i = 0; i < ce->num_interfaces; i ++) {
+				for (unsigned int i = 0; i < ce->num_interfaces; i ++) {
 					if (strcmp (ZSTR_VAL(ce->interfaces[i]->name), "ArrayAccess") == 0) {
 						has_array_access = true;
 					}
diff --git a/v8js_v8object_class.cc b/v8js_v8object_class.cc
index a86d7a2..ab63d95 100644
--- a/v8js_v8object_class.cc
+++ b/v8js_v8object_class.cc
@@ -510,8 +510,6 @@ static void v8js_v8generator_next(v8js_v8generator *g) /* {{{ */
 	 * some memory on bailout. */
 	{
 		std::function< v8::Local<v8::Value>(v8::Isolate *) > v8_call = [g](v8::Isolate *isolate) {
-			int i = 0;
-
 			v8::Local<v8::String> method_name = V8JS_STR("next");
 			v8::Local<v8::Object> v8obj = v8::Local<v8::Value>::New(isolate, g->v8obj.v8obj)->ToObject();
 			v8::Local<v8::Function> cb = v8::Local<v8::Function>::Cast(v8obj->Get(method_name));;