diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index ab0931e..aa458f2 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -741,7 +741,7 @@
 
 	/* slave modules need to be loaded in a context with unlocked mutex */
 	mutex_unlock(&dev->mutex);
-	request_module("w1-family-0x%02x", rn->family);
+	request_module("w1-family-0x%02X", rn->family);
 	mutex_lock(&dev->mutex);
 
 	spin_lock(&w1_flock);