diff --git a/firmware/common/fifo.hpp b/firmware/common/fifo.hpp
index f266304e..338f9056 100644
--- a/firmware/common/fifo.hpp
+++ b/firmware/common/fifo.hpp
@@ -139,7 +139,7 @@ private:
 	}
 
 	void smp_wmb() {
-		/*__DMB();*/
+		__DMB();
 	}
 
 	size_t peek_n() {