diff --git a/src/lib.rs b/src/lib.rs
index 795599f..8283961 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -176,6 +176,46 @@ impl PosixACL {
             entries.push(ACLEntry(qual, permset));
         }
 
+                // There should be at leas a UserObj, GroupObj, Other and Mask on the non default ACL entries. If they dont exist, create them
+
+        if !default {
+            let mut found_user = false;
+            let mut found_group = false;
+            let mut found_other = false;
+            let mut found_mask: Option<PermSet> = None;
+
+            for ent in entries.iter() {
+                match ent.0 {
+                    Qualifier::UserObj => {
+                        found_user = true;
+                    }
+                    Qualifier::GroupObj => {
+                        found_group = true;
+                    }
+                    Qualifier::Other => {
+                        found_other = true;
+                    }
+                    Qualifier::Mask => found_mask = Some(ent.1),
+                    _ => {}
+                }
+            }
+
+            let def_perm = found_mask.unwrap_or(ACL_RWX);
+
+            if !found_user {
+                entries.push(ACLEntry(Qualifier::UserObj, def_perm.clone()));
+            }
+            if !found_group {
+                entries.push(ACLEntry(Qualifier::GroupObj, def_perm.clone()));
+            }
+            if !found_other {
+                entries.push(ACLEntry(Qualifier::Other, def_perm.clone()));
+            }
+            if found_mask.is_none() {
+                entries.push(ACLEntry(Qualifier::Mask, def_perm.clone()));
+            }
+        }
+
         Ok(PosixACL { entries })
     }