diff --git a/src/libCom/osi/epicsStdio.h b/src/libCom/osi/epicsStdio.h
index 57da12c4c..bbc8a2631 100644
--- a/src/libCom/osi/epicsStdio.h
+++ b/src/libCom/osi/epicsStdio.h
@@ -67,6 +67,7 @@ epicsShareFunc int epicsShareAPI epicsStdoutPrintf(
 #undef printf
 #endif /*printf*/
 #define printf epicsStdoutPrintf
+#endif /* epicsStdioPVT */
 
 #ifdef  __cplusplus
 }