diff --git a/src/libCom/osi/os/posix/osdEvent.c b/src/libCom/osi/os/posix/osdEvent.c
index 764e39b2a..b3bfc5341 100644
--- a/src/libCom/osi/os/posix/osdEvent.c
+++ b/src/libCom/osi/os/posix/osdEvent.c
@@ -25,6 +25,7 @@
 #include "epicsTime.h"
 #include "errlog.h"
 #include "epicsAssert.h"
+#include "osdTime.h"
 
 /* Until these can be demonstrated to work leave them undefined*/
 #undef _POSIX_THREAD_PROCESS_SHARED