diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 71d21280f0..21589f994a 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -511,6 +511,9 @@ pub fn (mut c Checker) struct_init(mut struct_init ast.StructInit) table.Type {
 				struct_init.pos)
 		}
 	}
+	if type_sym.name.len == 1 && !c.cur_fn.is_generic {
+		c.error('unknown struct `$type_sym.name`', struct_init.pos)
+	}
 	match type_sym.kind {
 		.placeholder {
 			c.error('unknown struct: $type_sym.name', struct_init.pos)
diff --git a/vlib/v/checker/tests/unknown_struct_name.out b/vlib/v/checker/tests/unknown_struct_name.out
new file mode 100644
index 0000000000..d21f02d13e
--- /dev/null
+++ b/vlib/v/checker/tests/unknown_struct_name.out
@@ -0,0 +1,6 @@
+vlib/v/checker/tests/unknown_struct_name.vv:4:7: error: unknown struct `F`
+    2 |
+    3 | fn main() {
+    4 |     _ := F{}
+      |          ~~~
+    5 | }
diff --git a/vlib/v/checker/tests/unknown_struct_name.vv b/vlib/v/checker/tests/unknown_struct_name.vv
new file mode 100644
index 0000000000..52a433018e
--- /dev/null
+++ b/vlib/v/checker/tests/unknown_struct_name.vv
@@ -0,0 +1,5 @@
+module main
+
+fn main() {
+	_ := F{}
+}