diff --git a/artiq/coredevice/i2c.py b/artiq/coredevice/i2c.py
index 51b2b4e33..b51a6add2 100644
--- a/artiq/coredevice/i2c.py
+++ b/artiq/coredevice/i2c.py
@@ -3,7 +3,7 @@ from artiq.language.types import TBool, TInt32, TNone
 
 
 class I2CError(Exception):
-    """Raised with a I2C transaction fails."""
+    """Raised when a I2C transaction fails."""
     pass