David Wagner won't be pressing the transfer-window panic button despite a third straight defeat in all competitions for Huddersfield Town.
His side remained 17th in the Championship, but are now seven rather than eight points above the relegation zone.
Town have gone four games without a win, three of them in the league, and face a trip to Preston North End on Saturday.
"We are looking at some possible signings," said head coach Wagner.
"But as I have said, they must benefit us in the long term.
"If we don't make any, I won't be disappointed, because it will be my decision. We will go forward with the players we already have."
Cardiff won it through a Peter Whittingham double and a goal by Dutchman Lex Immers and led 3-1 before Harry Bunn's stoppage-time strike (it was 1-1 at half-time with Nahki Wells on target for Town).
Wagner added: "It was a tough game. The first half wasn't so good from our point of view. We were not able to keep the ball and bring our game onto the pitch.
"The second half was better and we had some very good opportunities and a big decision over possible penalty for handball. I have seen the clip on video and it was a clear handball.
"The first occasion when we lost the ball in our half, they scored and then it was very difficult for us to get back into the game.
"The positive thing was the lads kept going and got a goal back in overtime, but Cardiff were very strong and very focused.
"Usually if you score two goals at home you get something but we made too many mistakes and now we have to find a response."