diff --git a/platform/javascript/godot_js.h b/platform/javascript/godot_js.h
index 8927a83cb38..d332af2c311 100644
--- a/platform/javascript/godot_js.h
+++ b/platform/javascript/godot_js.h
@@ -84,7 +84,7 @@ extern void godot_js_display_cursor_set_custom_shape(const char *p_shape, const
 extern void godot_js_display_cursor_set_visible(int p_visible);
 
 // Display gamepad
-extern char *godot_js_display_gamepad_cb(void (*p_on_change)(int p_index, int p_connected, const char *p_id, const char *p_guid));
+extern void godot_js_display_gamepad_cb(void (*p_on_change)(int p_index, int p_connected, const char *p_id, const char *p_guid));
 extern int godot_js_display_gamepad_sample();
 extern int godot_js_display_gamepad_sample_count();
 extern int godot_js_display_gamepad_sample_get(int p_idx, float r_btns[16], int32_t *r_btns_num, float r_axes[10], int32_t *r_axes_num, int32_t *r_standard);
diff --git a/platform/javascript/js/libs/library_godot_display.js b/platform/javascript/js/libs/library_godot_display.js
index 91cab5eacc1..affae903705 100644
--- a/platform/javascript/js/libs/library_godot_display.js
+++ b/platform/javascript/js/libs/library_godot_display.js
@@ -683,7 +683,7 @@ const GodotDisplay = {
 		return GodotDisplayScreen.exitFullscreen();
 	},
 
-	godot_js_display_desired_size_set__sig: 'v',
+	godot_js_display_desired_size_set__sig: 'vii',
 	godot_js_display_desired_size_set: function (width, height) {
 		GodotDisplayScreen.desired_size = [width, height];
 		GodotDisplayScreen.updateSize();
diff --git a/platform/javascript/js/libs/library_godot_fetch.js b/platform/javascript/js/libs/library_godot_fetch.js
index 04b90aea9c6..615f9de8b03 100644
--- a/platform/javascript/js/libs/library_godot_fetch.js
+++ b/platform/javascript/js/libs/library_godot_fetch.js
@@ -126,7 +126,7 @@ const GodotFetch = {
 		},
 	},
 
-	godot_js_fetch_create__sig: 'iii',
+	godot_js_fetch_create__sig: 'iiiiiii',
 	godot_js_fetch_create: function (p_method, p_url, p_headers, p_headers_size, p_body, p_body_size) {
 		const method = GodotRuntime.parseString(p_method);
 		const url = GodotRuntime.parseString(p_url);
@@ -176,7 +176,7 @@ const GodotFetch = {
 		return obj.status;
 	},
 
-	godot_js_fetch_read_headers__sig: 'iii',
+	godot_js_fetch_read_headers__sig: 'iiii',
 	godot_js_fetch_read_headers: function (p_id, p_parse_cb, p_ref) {
 		const obj = IDHandler.get(p_id);
 		if (!obj || !obj.response) {
@@ -193,7 +193,7 @@ const GodotFetch = {
 		return 0;
 	},
 
-	godot_js_fetch_read_chunk__sig: 'ii',
+	godot_js_fetch_read_chunk__sig: 'iiii',
 	godot_js_fetch_read_chunk: function (p_id, p_buf, p_buf_size) {
 		const obj = IDHandler.get(p_id);
 		if (!obj || !obj.response) {
diff --git a/platform/javascript/js/libs/library_godot_javascript_singleton.js b/platform/javascript/js/libs/library_godot_javascript_singleton.js
index 09ef4a1a5d1..cb80273ca8f 100644
--- a/platform/javascript/js/libs/library_godot_javascript_singleton.js
+++ b/platform/javascript/js/libs/library_godot_javascript_singleton.js
@@ -196,7 +196,7 @@ const GodotJSWrapper = {
 		}
 	},
 
-	godot_js_wrapper_create_cb__sig: 'vii',
+	godot_js_wrapper_create_cb__sig: 'iii',
 	godot_js_wrapper_create_cb: function (p_ref, p_func) {
 		const func = GodotRuntime.get_func(p_func);
 		let id = 0;