diff -up gnome-applets-2.19.0/modemlights/modemlights.c.includes gnome-applets-2.19.0/modemlights/modemlights.c
--- gnome-applets-2.19.0/modemlights/modemlights.c.includes	2007-07-30 18:05:02.000000000 -0400
+++ gnome-applets-2.19.0/modemlights/modemlights.c	2007-07-30 18:05:13.000000000 -0400
@@ -41,6 +41,7 @@
 #endif
 
 #ifdef __linux__
+#include <linux/types.h>
 #include <linux/if_ppp.h>
 #include <sys/ioctl.h>
 #include <sys/types.h>