diff --git a/php_v8js_macros.h b/php_v8js_macros.h
index 7fca6db..b307101 100644
--- a/php_v8js_macros.h
+++ b/php_v8js_macros.h
@@ -156,6 +156,9 @@ struct _v8js_process_globals {
 	/* V8 command line flags */
 	char *v8_flags;
 
+	/* Path to icudtl.dat file */
+	char *icudtl_dat_path;
+
 	v8::Platform *v8_platform;
 };
 
diff --git a/v8js_main.cc b/v8js_main.cc
index b9acd51..bc60ba9 100644
--- a/v8js_main.cc
+++ b/v8js_main.cc
@@ -33,7 +33,7 @@ struct _v8js_process_globals v8js_process_globals;
 
 /* {{{ INI Settings */
 
-static ZEND_INI_MH(v8js_OnUpdateV8Flags) /* {{{ */
+static bool v8js_ini_string(char **field, const zend_string *new_value)/* {{{ */
 {
 	bool immutable = false;
 
@@ -56,18 +56,33 @@ static ZEND_INI_MH(v8js_OnUpdateV8Flags) /* {{{ */
 	}
 
 	if (new_value) {
-		if (v8js_process_globals.v8_flags) {
-			free(v8js_process_globals.v8_flags);
-			v8js_process_globals.v8_flags = NULL;
+		if (*field) {
+			free(*field);
+			*field = NULL;
 		}
+
 		if (!ZSTR_VAL(new_value)[0]) {
-			return FAILURE;
+			return SUCCESS;
 		}
-		v8js_process_globals.v8_flags = zend_strndup(ZSTR_VAL(new_value), ZSTR_LEN(new_value));
+
+		*field = zend_strndup(ZSTR_VAL(new_value), ZSTR_LEN(new_value));
 	}
 
 	return SUCCESS;
 }
+/* }}} */
+
+static ZEND_INI_MH(v8js_OnUpdateV8Flags) /* {{{ */
+{
+	return v8js_ini_string(&v8js_process_globals.v8_flags, new_value);
+}
+/* }}} */
+
+static ZEND_INI_MH(v8js_OnUpdateIcudatPath) /* {{{ */
+{
+	return v8js_ini_string(&v8js_process_globals.icudtl_dat_path, new_value);
+}
+/* }}} */
 
 static bool v8js_ini_to_bool(const zend_string *new_value) /* {{{ */
 {
@@ -106,6 +121,7 @@ static ZEND_INI_MH(v8js_OnUpdateCompatExceptions) /* {{{ */
 
 ZEND_INI_BEGIN() /* {{{ */
 	ZEND_INI_ENTRY("v8js.flags", NULL, ZEND_INI_ALL, v8js_OnUpdateV8Flags)
+	ZEND_INI_ENTRY("v8js.icudtl_dat_path", NULL, ZEND_INI_ALL, v8js_OnUpdateIcudatPath)
 	ZEND_INI_ENTRY("v8js.use_date", "0", ZEND_INI_ALL, v8js_OnUpdateUseDate)
 	ZEND_INI_ENTRY("v8js.use_array_access", "0", ZEND_INI_ALL, v8js_OnUpdateUseArrayAccess)
 	ZEND_INI_ENTRY("v8js.compat_php_exceptions", "0", ZEND_INI_ALL, v8js_OnUpdateCompatExceptions)
diff --git a/v8js_v8.cc b/v8js_v8.cc
index ecd6a99..f886f0c 100644
--- a/v8js_v8.cc
+++ b/v8js_v8.cc
@@ -76,10 +76,17 @@ void v8js_v8_init() /* {{{ */
 		}
 	}
 
-#if defined(PHP_V8_EXEC_PATH) && PHP_V8_API_VERSION >= 5003178
-    /* Initialize ICU, call introduced in V8 5.3.178 */
-	v8::V8::InitializeICUDefaultLocation(PHP_V8_EXEC_PATH, nullptr);
+#if PHP_V8_API_VERSION >= 5003178
+	/* Initialize ICU, call introduced in V8 5.3.178 */
+	if (v8js_process_globals.icudtl_dat_path != NULL && v8js_process_globals.icudtl_dat_path[0] != 0) {
+		v8::V8::InitializeICUDefaultLocation(nullptr, v8js_process_globals.icudtl_dat_path);
+	}
+#ifdef PHP_V8_EXEC_PATH
+	else {
+		v8::V8::InitializeICUDefaultLocation(PHP_V8_EXEC_PATH, nullptr);
+	}
 #endif
+#endif  /* PHP_V8_API_VERSION >= 5003178 */
 
 	/* Initialize V8 */
 	v8::V8::Initialize();