diff --git a/gi/pygi-info.c b/gi/pygi-info.c
index dc34090b158d453b1d908daaec503009cd14d8c6..e378a75365aa8d031903ef70e779946524fc77c8 100644
--- a/gi/pygi-info.c
+++ b/gi/pygi-info.c
@@ -1897,7 +1897,8 @@ field_array_length (GIFieldInfo *info, void *struct_data_ptr,
 
     gi_base_info_unref (type_info);
 
-    container_info = gi_base_info_get_container ((GIBaseInfo *)info);
+    container_info =
+        gi_base_info_get_container ((GIBaseInfo *)info); /* borrowed! */
 
     if (GI_IS_UNION_INFO (container_info)) {
         array_len_field = gi_union_info_get_field (
@@ -1912,7 +1913,6 @@ field_array_length (GIFieldInfo *info, void *struct_data_ptr,
         /* Other types don't have fields. */
         g_assert_not_reached ();
     }
-    gi_base_info_unref (container_info);
 
     if (array_len_field == NULL) {
         return FALSE;
diff --git a/tests/test_fields.py b/tests/test_fields.py
index 3236486acc8c113206d94b25d7f822dda978455a..d83dbdceb1b756ddb1e3a98944c08755e50f1583 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -1,9 +1,7 @@
 import math
 import unittest
 
-from gi.repository import GLib
-from gi.repository import Regress
-from gi.repository import GIMarshallingTests
+from gi.repository import GIMarshallingTests, GLib, Regress
 
 
 class Number:
@@ -177,3 +175,13 @@ class TestFields(unittest.TestCase):
     def test_ghashtable(self):
         obj = Regress.TestObj()
         self.assertTrue(obj.hash_table is None)
+
+    def test_array_field_with_length_annotation(self):
+        """Regression test for <https://gitlab.gnome.org/GNOME/pygobject/-/issues/738>
+        Every time an array field was accessed, the reference count of the struct info would be decreased.
+        This was only the case for array fields with a length annotation.
+        """
+        ITERATIONS = 100  # mostly arbitrarily chosen, but should be high enough to drop the reference count to zero.
+        obj = Regress.AnnotationFields()
+        for _ in range(0, ITERATIONS):
+            obj.arr