diff --git a/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java b/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java
index 0e776ffaa..a058d3197 100644
--- a/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java
+++ b/src/main/java/net/fabricmc/loom/configuration/providers/forge/MinecraftPatchedProvider.java
@@ -301,7 +301,7 @@ public MethodVisitor visitMethod(int access, String name, String descriptor, Str
 							return new MethodVisitor(Opcodes.ASM9, super.visitMethod(access, name, descriptor, signature, exceptions)) {
 								@Override
 								public void visitParameter(String name, int access) {
-									if (vignetteParameters.matcher(name).matches()) {
+									if (name != null && vignetteParameters.matcher(name).matches()) {
 										super.visitParameter(null, access);
 									} else {
 										super.visitParameter(name, access);