diff --git a/README.md b/README.md
index dc8c078cf..6bfb73818 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ ts-node --compiler ntypescript --project src --ignoreWarnings 2304 hello-world.t
 * **--ignoreWarnings, -I** Set an array of TypeScript diagnostic codes to ignore (also `process.env.TS_NODE_IGNORE_WARNINGS`)
 * **--disableWarnings, -D** Ignore all TypeScript errors (also `process.env.TS_NODE_DISABLE_WARNINGS`)
 * **--compilerOptions, -O** Set compiler options using JSON (E.g. `--compilerOptions '{"target":"es6"}'`) (also `process.env.TS_NODE_COMPILER_OPTIONS`)
-* **--fast, -F** Use TypeScript's `transpileModule` mode (no type checking, but faster compilation) (also `process.env.TS_NODE_FAST`)
+* **--type-check** Use TypeScript with type checking (also `process.env.TS_NODE_TYPE_CHECK`)
 * **--no-cache** Skip hitting the compiled JavaScript cache (also `process.env.TS_NODE_CACHE`)
 * **--cache-directory** Configure the TypeScript cache directory (also `process.env.TS_NODE_CACHE_DIRECTORY`)
 
diff --git a/src/index.ts b/src/index.ts
index 8fe8f8009..862758a2f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -97,7 +97,7 @@ const DEFAULTS = {
   project: process.env['TS_NODE_PROJECT'],
   ignore: split(process.env['TS_NODE_IGNORE']),
   ignoreWarnings: split(process.env['TS_NODE_IGNORE_WARNINGS']),
-  typeCheck: yn(process.env['TS_NODE_FAST'])
+  typeCheck: yn(process.env['TS_NODE_TYPE_CHECK'])
 }
 
 /**
@@ -272,7 +272,7 @@ export function register (options: Options = {}): Register {
   )
 
   let getTypeInfo = function (_code: string, _fileName: string, _position: number): TypeInfo {
-    throw new TypeError(`No type information available under "--fast" mode`)
+    throw new TypeError(`Type information is unavailable without "--type-check"`)
   }
 
   // Use full language services when the fast option is disabled.