diff --git a/src/peft/tuners/autograd_4bit.py b/src/peft/tuners/autograd_4bit.py
index 738bcfa..9d86f15 100644
--- a/src/peft/tuners/autograd_4bit.py
+++ b/src/peft/tuners/autograd_4bit.py
@@ -1,4 +1,4 @@
-import matmul_utils_4bit as mm4b
+import .matmul_utils_4bit as mm4b
 import torch
 import torch.nn as nn
 import time