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-rw-r--r--src/monitor-gui.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/monitor-gui.cc b/src/monitor-gui.cc
index 0670b80..ea2132c 100644
--- a/src/monitor-gui.cc
+++ b/src/monitor-gui.cc
@@ -1389,7 +1389,7 @@ private:
sum += (data[i * 2] << 8) | data[i * 2 + 1];
}
if (size % 2) sum += data[size - 1] << 8;
- return ~size;
+ return ~sum;
}
#else // HAVE_PCAP
static bool is_pcap(std::string const&) {