diff --git a/agadoo b/agadoo
index d175849..f59ff94 100755
--- a/agadoo
+++ b/agadoo
@@ -30,7 +30,7 @@ function get_input() {
 	const resolved = resolve(unresolved);
 
 	if (!resolved) {
-		error(`Could not resolve entry point`);
+		error(`Could not resolve entry point because the package.json doesn't expose "module" or "main" key.`);
 	}
 
 	return resolved;
@@ -55,4 +55,4 @@ function is_directory(file) {
 
 function if_exists(file) {
 	return fs.existsSync(file) ? file : null;
-}
\ No newline at end of file
+}