diff --git a/src/libCom/osi/os/posix/osdTime.cpp b/src/libCom/osi/os/posix/osdTime.cpp
index ae7cb5e35..f78558692 100644
--- a/src/libCom/osi/os/posix/osdTime.cpp
+++ b/src/libCom/osi/os/posix/osdTime.cpp
@@ -117,7 +117,7 @@ extern "C" epicsShareFunc void epicsShareAPI
     wait.tv_nsec = static_cast < long > ( (timeout - (double)wait.tv_sec) * 1e9 );
     wakeTime->tv_sec += wait.tv_sec;
     wakeTime->tv_nsec += wait.tv_nsec;
-    if(wakeTime->tv_nsec>1000000000L) {
+    if(wakeTime->tv_nsec>=1000000000L) {
         wakeTime->tv_nsec -= 1000000000L;
         ++wakeTime->tv_sec;
     }