diff --git a/drivers/pwm/pwm_th1520.rs b/drivers/pwm/pwm_th1520.rs
index 71b80761ec31..21b4bdaf0607 100644
--- a/drivers/pwm/pwm_th1520.rs
+++ b/drivers/pwm/pwm_th1520.rs
@@ -22,7 +22,6 @@
 
 use core::ops::Deref;
 use kernel::{
-    c_str,
     clk::Clk,
     device::{Bound, Core, Device},
     devres,
@@ -327,7 +326,7 @@ fn drop(self: Pin<&mut Self>) {
     OF_TABLE,
     MODULE_OF_TABLE,
     <Th1520PwmPlatformDriver as platform::Driver>::IdInfo,
-    [(of::DeviceId::new(c_str!("thead,th1520-pwm")), ())]
+    [(of::DeviceId::new(c"thead,th1520-pwm"), ())]
 );
 
 impl platform::Driver for Th1520PwmPlatformDriver {