diff --git a/src/libCom/osi/epicsThread.cpp b/src/libCom/osi/epicsThread.cpp
index 314124f88..00d4f76f2 100644
--- a/src/libCom/osi/epicsThread.cpp
+++ b/src/libCom/osi/epicsThread.cpp
@@ -257,7 +257,7 @@ const char *epicsThread::getNameSelf ()
 
 bool epicsThread::isOkToBlock ()
 {
-    return static_cast<int>(epicsThreadIsOkToBlock());
+    return static_cast<bool>(epicsThreadIsOkToBlock());
 }
 
 void epicsThread::setOkToBlock(bool isOkToBlock)