diff --git a/src/mactelnet.c b/src/mactelnet.c
index ec07d7b..3552e59 100644
--- a/src/mactelnet.c
+++ b/src/mactelnet.c
@@ -37,6 +37,7 @@
 #endif
 #if defined(__FreeBSD__) || defined(__APPLE__)
 #include <sys/types.h>
+#include <sys/mman.h>
 #include <net/ethernet.h>
 #else
 #include <netinet/ether.h>
diff --git a/src/mtwei.c b/src/mtwei.c
index 2a2b99f..679428f 100644
--- a/src/mtwei.c
+++ b/src/mtwei.c
@@ -36,7 +36,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <libintl.h>
-#if defined(__linux__)
+#if defined(HAVE_SYS_RANDOM_H)
 #include <sys/random.h>
 #endif