diff --git a/docs/command-line.md b/docs/command-line.md
index 80258ac65..695784261 100644
--- a/docs/command-line.md
+++ b/docs/command-line.md
@@ -7,6 +7,7 @@ Pyright can be run as either a VS Code extension or as a node-based command-line
 | --createstub IMPORT                 | Create type stub file(s) for import                  |
 | --dependencies                      | Emit import dependency information                   |
 | -h, --help                          | Show help message                                    |
+| --lib                               | Use library code for types when stubs are missing    |
 | --outputjson                        | Output results in JSON format                        |
 | -p, --project FILE OR DIRECTORY     | Use the configuration file at this location          |
 | --stats                             | Print detailed performance stats                     |
diff --git a/server/src/pyright.ts b/server/src/pyright.ts
index c1cef4cd2..eda3a18b8 100644
--- a/server/src/pyright.ts
+++ b/server/src/pyright.ts
@@ -65,6 +65,7 @@ function processArgs() {
         { name: 'dependencies', type: Boolean },
         { name: 'files', type: String, multiple: true, defaultOption: true },
         { name: 'help', alias: 'h', type: Boolean },
+        { name: 'lib', type: Boolean },
         { name: 'outputjson', type: Boolean },
         { name: 'project', alias: 'p', type: String },
         { name: 'stats' },
@@ -143,7 +144,7 @@ function processArgs() {
 
     options.verboseOutput = !!args.verbose;
     options.checkOnlyOpenFiles = false;
-    options.useLibraryCodeForTypes = false;
+    options.useLibraryCodeForTypes = !!args.lib;
 
     const watch = args.watch !== undefined;
     options.watch = watch;
@@ -230,6 +231,7 @@ function printUsage() {
         '  --createstub IMPORT              Create type stub file(s) for import\n' +
         '  --dependencies                   Emit import dependency information\n' +
         '  -h,--help                        Show this help message\n' +
+        '  --lib                            Use library code to infer types when stubs are missing' +
         '  --outputjson                     Output results in JSON format\n' +
         '  -p,--project FILE OR DIRECTORY   Use the configuration file at this location\n' +
         '  --stats                          Print detailed performance stats\n' +