diff --git a/embassy-stm32/src/usart/mod.rs b/embassy-stm32/src/usart/mod.rs
index dee466b2..e059c91b 100644
--- a/embassy-stm32/src/usart/mod.rs
+++ b/embassy-stm32/src/usart/mod.rs
@@ -465,7 +465,7 @@ impl<'d, T: BasicInstance, RxDma> UartRx<'d, T, RxDma> {
                 }
             }
 
-            if sr.idle() {
+            if enable_idle_line_detection && sr.idle() {
                 // Idle line
 
                 // stop dma transfer