diff --git a/gfx/common/win32_common.h b/gfx/common/win32_common.h
index 963db7f2cf..d780dc5a67 100644
--- a/gfx/common/win32_common.h
+++ b/gfx/common/win32_common.h
@@ -62,8 +62,6 @@ void create_gdi_context(HWND hwnd, bool *quit);
 
 bool gdi_has_menu_frame(void);
 
-bool win32_shader_dlg_init(void);
-void shader_dlg_show(HWND parent_hwnd);
 void shader_dlg_params_reload(void);
 #endif
 
diff --git a/ui/drivers/ui_win32.c b/ui/drivers/ui_win32.c
index 8de635b29c..ec7c2265cc 100644
--- a/ui/drivers/ui_win32.c
+++ b/ui/drivers/ui_win32.c
@@ -447,7 +447,7 @@ static LRESULT CALLBACK ShaderDlgWndProc(HWND hwnd, UINT message,
    return DefWindowProc(hwnd, message, wparam, lparam);
 }
 
-bool win32_shader_dlg_init(void)
+static bool win32_shader_dlg_init(void)
 {
    static bool inited = false;
    int pos_y;