diff --git a/ext/soap/soap.c b/ext/soap/soap.c
index 72807ce1956..5570dec5f8b 100644
--- a/ext/soap/soap.c
+++ b/ext/soap/soap.c
@@ -2886,7 +2886,7 @@ PHP_METHOD(SoapClient, __setLocation)
 	zval *tmp;
 	zval *this_ptr = ZEND_THIS;
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s", &location, &location_len) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s!", &location, &location_len) == FAILURE) {
 		RETURN_THROWS();
 	}
 
diff --git a/ext/soap/soap.stub.php b/ext/soap/soap.stub.php
index 298374e8663..01e41b7e879 100644
--- a/ext/soap/soap.stub.php
+++ b/ext/soap/soap.stub.php
@@ -108,5 +108,5 @@ class SoapClient
     public function __setSoapHeaders($headers = null) {}
 
     /** @return string|null */
-    public function __setLocation(string $location = "") {}
+    public function __setLocation(?string $location = null) {}
 }