diff --git a/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c b/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
index 9b9db41652..472a24ef55 100644
--- a/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
+++ b/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
@@ -2378,9 +2378,11 @@ gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
   if (gst_v4l2src_value_simplify (&interlace_formats)
       || gst_value_list_get_size (&interlace_formats) > 0)
     gst_structure_take_value (s, "interlace-mode", &interlace_formats);
-  else
+  else {
     GST_WARNING_OBJECT (v4l2object->dbg_obj,
         "Failed to determine interlace mode");
+    g_value_unset (&interlace_formats);
+  }
 
   return;
 }