diff --git a/project/src/ExternalInterface.cpp b/project/src/ExternalInterface.cpp
index de8c285a1..298a55316 100644
--- a/project/src/ExternalInterface.cpp
+++ b/project/src/ExternalInterface.cpp
@@ -4185,7 +4185,7 @@ namespace lime {
 	DEFINE_HL_PRIM (_VOID, hl_window_set_text_input_enabled, _TCFFIPOINTER _BOOL);
 	DEFINE_HL_PRIM (_VOID, hl_window_set_text_input_rect, _TCFFIPOINTER _TRECTANGLE);
 	DEFINE_HL_PRIM (_STRING, hl_window_set_title, _TCFFIPOINTER _STRING);
-	DEFINE_HL_PRIM (_VOID, hl_window_set_visible, _TCFFIPOINTER _BOOL);
+	DEFINE_HL_PRIM (_BOOL, hl_window_set_visible, _TCFFIPOINTER _BOOL);
 	DEFINE_HL_PRIM (_VOID, hl_window_warp_mouse, _TCFFIPOINTER _I32 _I32);
 	DEFINE_HL_PRIM (_F64, hl_window_get_opacity, _TCFFIPOINTER);
 	DEFINE_HL_PRIM (_VOID, hl_window_set_opacity, _TCFFIPOINTER _F64);