diff --git a/compat/crypt/sha256.c b/compat/crypt/sha256.c
index 73c43c03..ccc00a4b 100644
--- a/compat/crypt/sha256.c
+++ b/compat/crypt/sha256.c
@@ -24,8 +24,12 @@
  * SUCH DAMAGE.
  */
 
-#include <inttypes.h>
+/* For BSD */
+#if (defined(__unix__) || defined(unix)) && !defined(USG)
+#include <sys/param.h>
+#endif
 
+#include <inttypes.h>
 #include <string.h>
 
 #ifdef __GLIBC__