diff --git a/src/libCom/osi/os/Linux/osdTime.h b/src/libCom/osi/os/Linux/osdTime.h
index 4c8bd2592..c00a131a4 100644
--- a/src/libCom/osi/os/Linux/osdTime.h
+++ b/src/libCom/osi/os/Linux/osdTime.h
@@ -15,9 +15,20 @@
 #define osdTimeh
 
 /*
- * Linux needs this dummy include file since the POSIX version
+ * Linux needs this include file since the POSIX version
  * causes `struct timespec' to be defined in more than one place.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+epicsShareFunc void epicsShareAPI
+    convertDoubleToWakeTime(double timeout,struct timespec *wakeTime);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
 #endif /* ifndef osdTimeh */
 
diff --git a/src/libCom/osi/os/posix/osdEvent.c b/src/libCom/osi/os/posix/osdEvent.c
index b3bfc5341..764e39b2a 100644
--- a/src/libCom/osi/os/posix/osdEvent.c
+++ b/src/libCom/osi/os/posix/osdEvent.c
@@ -25,7 +25,6 @@
 #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