diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index f1217d9..b0005be 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -49,6 +49,8 @@ static void surface_bind_and_dirtify(IWineD3DSurfaceImpl *This) {
     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
         glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
         active_texture -= GL_TEXTURE0_ARB;
+        if (active_texture >= GL_MAX_TEXTURE_COORDS)
+            active_texture = 0; /* sanity checking */
     } else {
         active_texture = 0;
     }