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-rw-r--r--generic/tclIO.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclIO.c b/generic/tclIO.c
index afffeb8..4452ae9 100644
--- a/generic/tclIO.c
+++ b/generic/tclIO.c
@@ -7716,7 +7716,7 @@ Tcl_NotifyChannel(
if ((chPtr->mask & mask) != 0) {
nh.nextHandlerPtr = chPtr->nextPtr;
- (*(chPtr->proc))(chPtr->clientData, mask);
+ (*(chPtr->proc))(chPtr->clientData, chPtr->mask & mask);
chPtr = nh.nextHandlerPtr;
} else {
chPtr = chPtr->nextPtr;