diff --git a/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java b/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java
index e99eef2..cf958d9 100644
--- a/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java
+++ b/src/main/java/net/fabricmc/loom/extension/MixinExtensionApiImpl.java
@@ -44,7 +44,7 @@ public abstract class MixinExtensionApiImpl implements MixinExtensionAPI {
 	public MixinExtensionApiImpl(Project project) {
 		this.project = Objects.requireNonNull(project);
 		this.useMixinAp = project.getObjects().property(Boolean.class)
-				.convention(false);
+				.convention(true);
 	}
 
 	protected final PatternSet add0(SourceSet sourceSet, String refmapName) {