diff --git a/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java b/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java
index b4ad9a95..05c734c3 100644
--- a/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java
+++ b/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java
@@ -56,7 +56,7 @@ public abstract class MixinExtensionApiImpl implements MixinExtensionAPI {
 	public MixinExtensionApiImpl(Project project) {
 		this.project = Objects.requireNonNull(project);
 		this.useMixinAp = project.getObjects().property(Boolean.class)
-				.convention(project.provider(() -> shouldUseMixinApByDefault(project)));
+				.convention(false);
 
 		this.refmapTargetNamespace = project.getObjects().property(String.class)
 				.convention(project.provider(() -> IntermediaryNamespaces.runtimeIntermediary(project)));
@@ -69,10 +69,6 @@ public abstract class MixinExtensionApiImpl implements MixinExtensionAPI {
 		this.showMessageTypes.convention(false).finalizeValueOnRead();
 	}
 
-	private static boolean shouldUseMixinApByDefault(Project project) {
-		return LoomGradleExtension.get(project).isForge() && !LoomGradleExtension.get(project).getForgeProvider().usesMojangAtRuntime();
-	}
-
 	protected final PatternSet add0(SourceSet sourceSet, String refmapName) {
 		return add0(sourceSet, project.provider(() -> refmapName));
 	}