diff --git a/lib/core/src/server/serverRequire.js b/lib/core/src/server/serverRequire.js
index db47dc4ae2c5..9deb4cba90e9 100644
--- a/lib/core/src/server/serverRequire.js
+++ b/lib/core/src/server/serverRequire.js
@@ -84,7 +84,7 @@ export default function serverRequire(filePath) {
 
   const moduleDescriptor = interpret.extensions[candidateExt];
 
-  if (registerCompiler(moduleDescriptor) === 0) {
+  if (moduleDescriptor !== null && registerCompiler(moduleDescriptor) === 0) {
     logger.warn(`=> File ${candidatePath} is detected`);
     logger.warn(`   but impossible to import loader for ${candidateExt}`);