diff --git a/loader/src/main/java/net/neoforged/fml/config/ConfigTracker.java b/loader/src/main/java/net/neoforged/fml/config/ConfigTracker.java
index 1f9cd639b..e293fc571 100644
--- a/loader/src/main/java/net/neoforged/fml/config/ConfigTracker.java
+++ b/loader/src/main/java/net/neoforged/fml/config/ConfigTracker.java
@@ -195,6 +195,7 @@ private void closeConfig(final ModConfig config) {
                 LOGGER.trace(CONFIG, "Closing config file type {} at {} for {}", config.getType(), config.getFileName(), config.getModId());
                 unload(config);
                 config.config = null;
+                config.getSpec().acceptConfig(null);
                 config.postConfigEvent(ModConfigEvent.Unloading::new);
             } else {
                 LOGGER.warn(CONFIG, "Closing non-file config {} at path {}", config.config, config.getFileName());
diff --git a/loader/src/main/java/net/neoforged/fml/config/IConfigSpec.java b/loader/src/main/java/net/neoforged/fml/config/IConfigSpec.java
index 7cbc343db..f66e823c8 100644
--- a/loader/src/main/java/net/neoforged/fml/config/IConfigSpec.java
+++ b/loader/src/main/java/net/neoforged/fml/config/IConfigSpec.java
@@ -8,6 +8,7 @@
 import com.electronwill.nightconfig.core.CommentedConfig;
 import com.electronwill.nightconfig.core.Config;
 import com.electronwill.nightconfig.core.UnmodifiableCommentedConfig;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * A config spec is responsible for interpreting (loading, correcting) raw {@link CommentedConfig}s from NightConfig.
@@ -52,5 +53,5 @@ public interface IConfigSpec {
      * This is called on loading and on reloading.
      * The config is guaranteed to be valid according to {@link #isCorrect}.
      */
-    void acceptConfig(CommentedConfig config);
+    void acceptConfig(@Nullable CommentedConfig config);
 }