diff --git a/sys/dev/mrsas/mrsas_ioctl.c b/sys/dev/mrsas/mrsas_ioctl.c
index b8d88c164e81..7f1d9a91ba0f 100644
--- a/sys/dev/mrsas/mrsas_ioctl.c
+++ b/sys/dev/mrsas/mrsas_ioctl.c
@@ -55,6 +55,10 @@ struct mrsas_passthru_cmd {
 	int complete;
 };
 
+#ifndef PTRIN
+#define PTRIN(p) ((void *)(uintptr_t)(p))
+#endif
+
 /*
  * Function prototypes
  */