The midfielder arrived at Victoria Road from Portsmouth last month on an initial four-week deal.
However, having made six appearances and scored one goal since then, the 26-year-old has agreed to remain with the League Two strugglers until early 2016.
Dunne is expected to feature for the bottom-placed Daggers when they take on league leaders Plymouth Argyle on Saturday afternoon.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Portsmouth | 43 | 26 | 13 | 4 | 72 | 37 | 35 | 91 |
| 2 | Derby CountyDerby | 44 | 26 | 8 | 10 | 75 | 37 | 38 | 86 |
| 3 | Bolton WanderersBolton | 43 | 24 | 10 | 9 | 79 | 46 | 33 | 82 |
| 4 | Peterborough UnitedPeterborough | 42 | 23 | 8 | 11 | 80 | 55 | 25 | 77 |
| 5 | Barnsley | 43 | 21 | 12 | 10 | 77 | 57 | 20 | 75 |
| 6 | Oxford UnitedOxford Utd | 43 | 21 | 10 | 12 | 76 | 53 | 23 | 73 |
| 7 | Blackpool | 44 | 20 | 10 | 14 | 60 | 43 | 17 | 70 |
| 8 | Lincoln CityLincoln | 43 | 18 | 14 | 11 | 62 | 37 | 25 | 68 |
| 9 | Stevenage | 44 | 18 | 13 | 13 | 54 | 44 | 10 | 67 |
| 10 | Leyton Orient | 44 | 17 | 11 | 16 | 50 | 53 | -3 | 62 |
| 11 | Northampton TownNorthampton | 44 | 17 | 8 | 19 | 55 | 63 | -8 | 59 |
| 12 | Exeter CityExeter | 44 | 16 | 10 | 18 | 43 | 58 | -15 | 58 |
| 13 | Wigan AthleticWigan | 44 | 18 | 10 | 16 | 59 | 55 | 4 | 56 |
| 14 | Wycombe WanderersWycombe | 42 | 14 | 13 | 15 | 53 | 52 | 1 | 55 |
| 15 | Bristol Rovers | 43 | 15 | 9 | 19 | 51 | 64 | -13 | 54 |
| 16 | Charlton AthleticCharlton | 44 | 11 | 19 | 14 | 63 | 63 | 0 | 52 |
| 17 | Reading | 44 | 15 | 11 | 18 | 63 | 65 | -2 | 50 |
| 18 | Cambridge UnitedCambridge | 42 | 12 | 10 | 20 | 38 | 58 | -20 | 46 |
| 19 | Shrewsbury TownShrewsbury | 43 | 13 | 7 | 23 | 31 | 61 | -30 | 46 |
| 20 | Burton Albion | 43 | 11 | 10 | 22 | 35 | 60 | -25 | 43 |
| 21 | Port Vale | 43 | 10 | 10 | 23 | 40 | 70 | -30 | 40 |
| 22 | Cheltenham TownCheltenham | 42 | 10 | 8 | 24 | 35 | 60 | -25 | 38 |
| 23 | Fleetwood TownFleetwood | 43 | 8 | 13 | 22 | 44 | 68 | -24 | 37 |
| R | Carlisle UnitedCarlisle | 44 | 7 | 9 | 28 | 40 | 76 | -36 | 30 |
| > League One Full Table | |||||||||
