diff --git a/psl/psl-core/src/common/preview_features.rs b/psl/psl-core/src/common/preview_features.rs
index 49e860575512..ea9b0eceea81 100644
--- a/psl/psl-core/src/common/preview_features.rs
+++ b/psl/psl-core/src/common/preview_features.rs
@@ -81,7 +81,8 @@ features!(
     ReactNative,
     PrismaSchemaFolder,
     OmitApi,
-    TypedSql
+    TypedSql,
+    StrictUndefinedChecks
 );
 
 /// Generator preview features (alphabetically sorted)
@@ -100,6 +101,7 @@ pub const ALL_PREVIEW_FEATURES: FeatureMap = FeatureMap {
          | RelationJoins
          | OmitApi
          | PrismaSchemaFolder
+         | StrictUndefinedChecks
     }),
     deprecated: enumflags2::make_bitflags!(PreviewFeature::{
         AtomicNumberOperations
diff --git a/psl/psl/tests/config/generators.rs b/psl/psl/tests/config/generators.rs
index 273de14c7443..20e8f8864402 100644
--- a/psl/psl/tests/config/generators.rs
+++ b/psl/psl/tests/config/generators.rs
@@ -258,7 +258,7 @@ fn nice_error_for_unknown_generator_preview_feature() {
         .unwrap_err();
 
     let expectation = expect![[r#"
-        error: The preview feature "foo" is not known. Expected one of: deno, driverAdapters, fullTextIndex, fullTextSearch, metrics, multiSchema, nativeDistinct, postgresqlExtensions, tracing, views, relationJoins, prismaSchemaFolder, omitApi
+        error: The preview feature "foo" is not known. Expected one of: deno, driverAdapters, fullTextIndex, fullTextSearch, metrics, multiSchema, nativeDistinct, postgresqlExtensions, tracing, views, relationJoins, prismaSchemaFolder, omitApi, strictUndefinedChecks
           -->  schema.prisma:3
            | 
          2 |   provider = "prisma-client-js"