--- a/colorcorrection/clockskewnotifierengine_linux.cpp	
+++ a/colorcorrection/clockskewnotifierengine_linux.cpp	
@@ -23,6 +23,7 @@ 
 #include <fcntl.h>
 #include <sys/timerfd.h>
 #include <unistd.h>
+#include <cerrno>
 
 #ifndef TFD_TIMER_CANCEL_ON_SET // only available in newer glib
 #define TFD_TIMER_CANCEL_ON_SET (1 << 1)