diff --git a/src/libCom/osi/epicsTime.h b/src/libCom/osi/epicsTime.h
index af6175712..1113d6133 100644
--- a/src/libCom/osi/epicsTime.h
+++ b/src/libCom/osi/epicsTime.h
@@ -250,8 +250,8 @@ epicsShareFunc void epicsShareAPI epicsTimeShow (
 
 /* OS dependent reentrant versions of the ANSI C interface because */
 /* vxWorks gmtime_r interface does not match POSIX standards */
-int epicsTime_localtime ( const time_t * clock, struct tm * result );
-int epicsTime_gmtime ( const time_t * clock, struct tm * result );
+epicsShareFunc int epicsShareAPI epicsTime_localtime ( const time_t * clock, struct tm * result );
+epicsShareFunc int epicsShareAPI epicsTime_gmtime ( const time_t * clock, struct tm * result );
 
 #ifdef __cplusplus
 }
diff --git a/src/libCom/osi/os/WIN32/osdTime.cpp b/src/libCom/osi/os/WIN32/osdTime.cpp
index f5c8fa714..eea593f78 100644
--- a/src/libCom/osi/os/WIN32/osdTime.cpp
+++ b/src/libCom/osi/os/WIN32/osdTime.cpp
@@ -173,7 +173,7 @@ static int dayOfYear ( DWORD day, DWORD month, DWORD year )
 }
 
 // synthesize a reentrant gmtime on WIN32
-int epicsTime_gmtime ( const time_t *pAnsiTime, struct tm *pTM )
+int epicsShareAPI epicsTime_gmtime ( const time_t *pAnsiTime, struct tm *pTM )
 {
     FILETIME ft;
     UnixTimeToFileTime ( pAnsiTime, &ft );
@@ -201,7 +201,7 @@ int epicsTime_gmtime ( const time_t *pAnsiTime, struct tm *pTM )
 }
 
 // synthesize a reentrant localtime on WIN32
-int epicsTime_localtime ( 
+int epicsShareAPI epicsTime_localtime ( 
     const time_t * pAnsiTime, struct tm * pTM )
 {
     FILETIME ft;