loader: add missing checks for FreeBSD_kernel (2/5)

[Austin English]

-- 
-Austin
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diff --git a/loader/main.c b/loader/main.c
index e19b1bb..8434d81 100644
--- a/loader/main.c
+++ b/loader/main.c
@@ -174,7 +174,7 @@ static int pre_exec(void)
     return 1;  /* we have a preloader on x86-64 */
 }
 
-#elif defined(__FreeBSD__) && defined(__i386__)
+#elif (defined(__FreeBSD__) || defined (__FreeBSD_kernel__)) && defined(__i386__)
 
 static int pre_exec(void)
 {