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-rw-r--r--ui/qt/capture_filter_syntax_worker.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/ui/qt/capture_filter_syntax_worker.cpp b/ui/qt/capture_filter_syntax_worker.cpp
index e2dae2bac0..83f9b13375 100644
--- a/ui/qt/capture_filter_syntax_worker.cpp
+++ b/ui/qt/capture_filter_syntax_worker.cpp
@@ -88,7 +88,7 @@ void CaptureFilterSyntaxWorker::start() {
device = g_array_index(global_capture_opts.all_ifaces, interface_t, if_idx);
if (!device.locked && device.selected) {
#ifdef HAVE_EXTCAP
- if (device.if_info.extcap == NULL)
+ if (device.if_info.extcap == NULL || strlen(device.if_info.extcap) == 0)
{
#endif
if (device.active_dlt >= DLT_USER0 && device.active_dlt <= DLT_USER15) {