diff --git a/src/libCom/os/generic/osdTime.cc b/src/libCom/os/generic/osdTime.cc
index 419c62e97..280c2dd09 100644
--- a/src/libCom/os/generic/osdTime.cc
+++ b/src/libCom/os/generic/osdTime.cc
@@ -3,6 +3,7 @@
 // should move the time stuff into a different header
 //
 #include "osiSock.h"
+#include "epicsAssert.h"
 
 #define epicsExportSharedSymbols
 #include "osiTime.h"