1 files changed, 2 insertions, 1 deletions
diff --git a/scene/resources/surface_tool.h b/scene/resources/surface_tool.h
index d18c1fc263..459d399380 100644
--- a/scene/resources/surface_tool.h
+++ b/scene/resources/surface_tool.h
@@ -27,6 +27,7 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
+
 #ifndef SURFACE_TOOL_H
 #define SURFACE_TOOL_H
 
@@ -115,7 +116,7 @@ public:
 
 	void index();
 	void deindex();
-	void generate_normals();
+	void generate_normals(bool p_flip = false);
 	void generate_tangents();
 
 	void add_to_format(int p_flags) { format |= p_flags; }