diff --git a/src/soc/sifive/fu540/uart.c b/src/soc/sifive/fu540/uart.c
index 34a1039b6c..db9fa46c4e 100644
--- a/src/soc/sifive/fu540/uart.c
+++ b/src/soc/sifive/fu540/uart.c
@@ -4,6 +4,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <console/uart.h>
+#include <commonlib/bsd/helpers.h>
 #include <soc/addressmap.h>
 #include <soc/clock.h>