diff --git a/lib/inject.js b/lib/inject.js
index 12267376..d3dacc7f 100644
--- a/lib/inject.js
+++ b/lib/inject.js
@@ -99,6 +99,10 @@ function moveModuleUp(source, target, module) {
  * @return {Promise} the combined promise for requirements injection.
  */
 async function injectAllRequirements(funcArtifact) {
+  if (this.targetFuncs.length === 0) {
+    return BbPromise.resolve();
+  }
+
   if (this.options.layer) {
     // The requirements will be placed in a Layer, so just resolve
     return BbPromise.resolve();