diff -uNr a/mpcenc/keyboard.c b/mpcenc/keyboard.c
--- a/mpcenc/keyboard.c	2006-12-19 13:39:02.000000000 -0600
+++ b/mpcenc/keyboard.c	2021-06-03 13:54:01.000000000 -0500
@@ -84,6 +84,8 @@
 #  define echo_on()   (void)0
 # endif
 
+# include <sys/select.h>
+
 int
 WaitKey ( void )
 {
diff -uNr a/mpcenc/mpcenc.h b/mpcenc/mpcenc.h
--- a/mpcenc/mpcenc.h	2009-02-23 12:15:46.000000000 -0600
+++ b/mpcenc/mpcenc.h	2021-06-03 14:00:30.000000000 -0500
@@ -50,7 +50,7 @@
 # include <unistd.h>
 #endif
 
-#if   defined __linux__
+#if   defined __GLIBC__
 #  include <fpu_control.h>
 #elif defined __FreeBSD__
 # include <machine/floatingpoint.h>