diff --git a/doc/api/esm.md b/doc/api/esm.md
index 85a7146fc13f46..8d1980a4e0c6ad 100644
--- a/doc/api/esm.md
+++ b/doc/api/esm.md
@@ -1016,6 +1016,8 @@ 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