diff --git a/winradio/winradio.c b/winradio/winradio.c
index 37f29a64f..097fb1706 100644
--- a/winradio/winradio.c
+++ b/winradio/winradio.c
@@ -46,7 +46,7 @@
 
 int wr_rig_init(RIG *rig) {
   rig->state.rigport.type.rig = RIG_PORT_DEVICE;
-  strncpy(rig->state.rigport.pathname, DEFAULT_WINRADIO_PATH, FILPATHLEN);
+  strncpy(rig->state.rigport.pathname, DEFAULT_WINRADIO_PATH, FILPATHLEN - 1);
 
   return RIG_OK;
 }