--- a/com/mojang/blaze3d/vertex/IVertexBuilder.java
+++ b/com/mojang/blaze3d/vertex/IVertexBuilder.java
@@ -17,7 +17,7 @@
 import org.lwjgl.system.MemoryStack;
 
 @OnlyIn(Dist.CLIENT)
-public interface IVertexBuilder {
+public interface IVertexBuilder extends net.minecraftforge.client.extensions.IForgeVertexBuilder {
    Logger field_227884_f_ = LogManager.getLogger();
 
    IVertexBuilder func_225582_a_(double p_225582_1_, double p_225582_3_, double p_225582_5_);