diff --git a/mixer/src/Project.C b/mixer/src/Project.C
index e78e0aa..acd50fa 100644
--- a/mixer/src/Project.C
+++ b/mixer/src/Project.C
@@ -29,6 +29,7 @@
 #include <sys/stat.h>
 #include <sys/fcntl.h>
 #include <errno.h>
+#include <unistd.h>
 
 #include "Loggable.H"
 #include "Project.H"
diff --git a/timeline/src/Engine/Timeline.C b/timeline/src/Engine/Timeline.C
index 241a1ee..db80700 100644
--- a/timeline/src/Engine/Timeline.C
+++ b/timeline/src/Engine/Timeline.C
@@ -27,6 +27,8 @@
 
 #include "Thread.H"
 
+#include <unistd.h>
+
 /** Initiate recording for all armed tracks */
 bool
 Timeline::record ( void )