diff --git a/docker/Dockerfile.simulated_onu b/docker/Dockerfile.simulated_onu
index 3c66d33..4f4b95d 100644
--- a/docker/Dockerfile.simulated_onu
+++ b/docker/Dockerfile.simulated_onu
@@ -44,6 +44,7 @@
 COPY adapters/simulated_onu ./adapters/simulated_onu
 COPY adapters/common ./adapters/common
 COPY adapters/*.go ./adapters/
+COPY adapters/adapterif ./adapters/adapterif
 
 ARG org_label_schema_version=unknown
 ARG org_label_schema_vcs_url=unknown