diff --git a/src/main/java/net/fabricmc/loom/task/UnpickJarTask.java b/src/main/java/net/fabricmc/loom/task/UnpickJarTask.java
index 3ac72fec..22825794 100644
--- a/src/main/java/net/fabricmc/loom/task/UnpickJarTask.java
+++ b/src/main/java/net/fabricmc/loom/task/UnpickJarTask.java
@@ -69,6 +69,7 @@ public abstract class UnpickJarTask extends JavaExec {
 
 		getConstantJar().setFrom(getProject().getConfigurations().getByName(Constants.Configurations.MAPPING_CONSTANTS));
 		getUnpickClasspath().setFrom(getProject().getConfigurations().getByName(Constants.Configurations.MINECRAFT_DEPENDENCIES));
+		getUnpickClasspath().from(getProject().getConfigurations().getByName(Constants.Configurations.MOD_COMPILE_CLASSPATH_MAPPED));
 	}
 
 	@Override