diff --git a/src/drivers/Unix/Fl_Unix_Screen_Driver.H b/src/drivers/Unix/Fl_Unix_Screen_Driver.H
index 2b8a5a7ab..36eb943f8 100644
--- a/src/drivers/Unix/Fl_Unix_Screen_Driver.H
+++ b/src/drivers/Unix/Fl_Unix_Screen_Driver.H
@@ -52,7 +52,9 @@ static pollfd *pollfds = 0;
 
 class Fl_Unix_Screen_Driver : public Fl_Screen_Driver {
 public:
+#  if !USE_POLL
   static fd_set fdsets[3];
+#  endif
   static int maxfd;
   static int nfds;
   static struct FD {
diff --git a/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx b/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx
index 18f936243..4988474cb 100644
--- a/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx
+++ b/src/drivers/Unix/Fl_Unix_Screen_Driver.cxx
@@ -18,7 +18,9 @@
 #include <sys/time.h>
 #include "Fl_Unix_Screen_Driver.H"
 
+#if !USE_POLL
 fd_set Fl_Unix_Screen_Driver::fdsets[3];
+#endif
 int Fl_Unix_Screen_Driver::maxfd = 0;
 int Fl_Unix_Screen_Driver::nfds = 0;
 Fl_Unix_Screen_Driver::FD *Fl_Unix_Screen_Driver::fd = NULL;