diff --git a/drivers/ddr/altera/sdram_agilex.c b/drivers/ddr/altera/sdram_agilex.c
index 0cbcd14..626fb72 100644
--- a/drivers/ddr/altera/sdram_agilex.c
+++ b/drivers/ddr/altera/sdram_agilex.c
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <div64.h>
 #include <fdtdec.h>
+#include <hang.h>
 #include <ram.h>
 #include <reset.h>
 #include "sdram_soc64.h"