diff --git a/doc/api/esm.md b/doc/api/esm.md
index 5a180d21f88ae8..f8d2c75336bc35 100644
--- a/doc/api/esm.md
+++ b/doc/api/esm.md
@@ -1012,6 +1012,8 @@ The resolver can throw the following errors:
   subpath in the package for the given module.
 * _Package Import Not Defined_: Package imports do not define the specifier.
 * _Module Not Found_: The package or module requested does not exist.
+* _Unsupported Directory Import_: The resolved path corresponds to a directory,
+  which is not a supported target for module imports.
 
 ### Resolver Algorithm Specification