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-rw-r--r--generic/tclIORChan.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/generic/tclIORChan.c b/generic/tclIORChan.c
index 2e5fa45..bbb5b88 100644
--- a/generic/tclIORChan.c
+++ b/generic/tclIORChan.c
@@ -1508,6 +1508,14 @@ ReflectWatch(
mask &= rcPtr->mode;
+ if (mask == rcPtr->interest) {
+ /*
+ * Same old, same old, why should we do something?
+ */
+
+ return;
+ }
+
rcPtr->interest = mask;
/*