diff --git a/src/libCom/osi/tsStamp.h b/src/libCom/osi/tsStamp.h
index dc1f0441a..5d61faa9d 100644
--- a/src/libCom/osi/tsStamp.h
+++ b/src/libCom/osi/tsStamp.h
@@ -15,6 +15,7 @@
 #define tsStamph
 
 #include <time.h>
+#include "osdTime.h"
 
 #include "shareLib.h"
 #include "epicsTypes.h"
@@ -23,11 +24,6 @@
 extern "C" {
 #endif /* __cplusplus */
 
-#ifndef HP_UX
-struct timespec;
-struct timeval;
-#endif
-
 #define tsStampOK 0
 #define tsStampERROR (-1)