diff --git a/plugins/builder-dockerfile/builder-build b/plugins/builder-dockerfile/builder-build
index 0ff7d1f6b09..42001d2eb33 100755
--- a/plugins/builder-dockerfile/builder-build
+++ b/plugins/builder-dockerfile/builder-build
@@ -41,10 +41,7 @@ trigger-builder-dockerfile-builder-build() {
   eval "$(config_export app "$APP")"
   "$DOCKER_BIN" image build "${DOCKER_BUILD_LABEL_ARGS[@]}" $DOKKU_GLOBAL_BUILD_ARGS "${ARG_ARRAY[@]}" ${DOKKU_DOCKER_BUILD_OPTS} -t $IMAGE .
 
-  set -x
-  fn-builder-dockerfile-get-detect-port-map "$APP" "$IMAGE" "$SOURCECODE_WORK_DIR/Dockerfile"
   plugn trigger ports-set-detected "$APP" "$(fn-builder-dockerfile-get-detect-port-map "$APP" "$IMAGE" "$SOURCECODE_WORK_DIR/Dockerfile")"
-  set +x
   plugn trigger post-build-dockerfile "$APP"
 }