diff --git a/core/io/http_client.cpp b/core/io/http_client.cpp
index 3d18a741481..753ef6ce8a1 100644
--- a/core/io/http_client.cpp
+++ b/core/io/http_client.cpp
@@ -611,7 +611,7 @@ Error HTTPClient::poll() {
 	return OK;
 }
 
-int HTTPClient::get_response_body_length() const {
+int64_t HTTPClient::get_response_body_length() const {
 	return body_size;
 }
 
diff --git a/core/io/http_client.h b/core/io/http_client.h
index b9fed898e98..6a535c0ddbd 100644
--- a/core/io/http_client.h
+++ b/core/io/http_client.h
@@ -220,7 +220,7 @@ public:
 	bool is_response_chunked() const;
 	int get_response_code() const;
 	Error get_response_headers(List<String> *r_response);
-	int get_response_body_length() const;
+	int64_t get_response_body_length() const;
 
 	PoolByteArray read_response_body_chunk(); // Can't get body as partial text because of most encodings UTF8, gzip, etc.
 
diff --git a/platform/javascript/http_client_javascript.cpp b/platform/javascript/http_client_javascript.cpp
index 7e0a2591c51..1cc8f5220d7 100644
--- a/platform/javascript/http_client_javascript.cpp
+++ b/platform/javascript/http_client_javascript.cpp
@@ -185,7 +185,7 @@ Error HTTPClient::get_response_headers(List<String> *r_response) {
 	return OK;
 }
 
-int HTTPClient::get_response_body_length() const {
+int64_t HTTPClient::get_response_body_length() const {
 	return godot_js_fetch_body_length_get(js_id);
 }