diff --git a/releasenotes.md b/releasenotes.md
index c12c93d23..bf087acf0 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -46,6 +46,7 @@
 - Resolving a missing property on a const enum with inline, reached an assert #2597.
 - Unexpected maybe-deref subscript error with out parameter #2600.
 - Bug on rethrow in return with defer #2603.
+- Fix bug when converting from vector to distinct type of wider vector. #2604
 
 ### Stdlib changes
 - Add `CGFloat` `CGPoint` `CGSize` `CGRect` types to core_foundation (macOS).
diff --git a/src/compiler/sema_casts.c b/src/compiler/sema_casts.c
index ac4e573c6..1636f7afc 100644
--- a/src/compiler/sema_casts.c
+++ b/src/compiler/sema_casts.c
@@ -2020,8 +2020,7 @@ static void cast_vec_to_vec(Expr *expr, Type *to_type)
 		// Extract indexed types.
 		Type *from_type = type_flatten(expr->type);
 		Type *from_element = from_type->array.base;
-		to_type = type_flatten(to_type);
-		Type *to_element = to_type->array.base;
+		Type *to_element = type_flatten(to_type)->array.base;
 
 		// float vec -> float/int/bool vec
 		if (type_is_float(from_element))
diff --git a/test/test_suite/bitstruct/cast_distinct_vec_to_other_vec.c3t b/test/test_suite/bitstruct/cast_distinct_vec_to_other_vec.c3t
new file mode 100644
index 000000000..b6c292c5a
--- /dev/null
+++ b/test/test_suite/bitstruct/cast_distinct_vec_to_other_vec.c3t
@@ -0,0 +1,10 @@
+typedef Foo = char[<4>];
+
+fn int main()
+{
+	int[<4>] a;
+	Foo f = (Foo)a;
+	return 0;
+}
+
+fn void thing() {}