diff --git a/mgetty/frontends/X11/viewfax/viewfax.c b/mgetty/frontends/X11/viewfax/viewfax.c
index 204b80b..5771b4d 100644
--- a/mgetty/frontends/X11/viewfax/viewfax.c
+++ b/mgetty/frontends/X11/viewfax/viewfax.c
@@ -451,6 +451,8 @@ usleep(unsigned usecs)
     (void) select(1, NULL, NULL, NULL, &t);
     return 0;
 }
+#else
+#include <unistd.h>
 #endif
 
 #ifndef REAL_ROOT
diff --git a/mgetty/tools/microcom.c b/mgetty/tools/microcom.c
index 5f59a95..c33fccd 100644
--- a/mgetty/tools/microcom.c
+++ b/mgetty/tools/microcom.c
@@ -7,6 +7,7 @@
  * Calls routines in io.c, tio.c
  */
 #include <stdio.h>
+#include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>