diff --git a/crates/ty_python_semantic/resources/corpus/inner_expression_inference_state.py b/crates/ty_python_semantic/resources/corpus/inner_expression_inference_state.py
new file mode 100644
index 0000000000000..dcf4bd462b604
--- /dev/null
+++ b/crates/ty_python_semantic/resources/corpus/inner_expression_inference_state.py
@@ -0,0 +1,6 @@
+# This is a regression test for `store_expression_type`.
+# ref: https://github.com/astral-sh/ty/issues/1688
+
+x: int
+
+type x[T] = x[T, U]
diff --git a/crates/ty_python_semantic/src/types/infer/builder.rs b/crates/ty_python_semantic/src/types/infer/builder.rs
index 4c97ad8c60628..3079245c3ed6c 100644
--- a/crates/ty_python_semantic/src/types/infer/builder.rs
+++ b/crates/ty_python_semantic/src/types/infer/builder.rs
@@ -7093,10 +7093,13 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
 
     #[track_caller]
     fn store_expression_type(&mut self, expression: &ast::Expr, ty: Type<'db>) {
-        if self.deferred_state.in_string_annotation() {
+        if self.deferred_state.in_string_annotation()
+            || self.inner_expression_inference_state.is_get()
+        {
             // Avoid storing the type of expressions that are part of a string annotation because
             // the expression ids don't exists in the semantic index. Instead, we'll store the type
             // on the string expression itself that represents the annotation.
+            // Also, if `inner_expression_inference_state` is `Get`, the expression type has already been stored.
             return;
         }