diff --git a/src/main.cpp b/src/main.cpp
index f4e0090..b3f1680 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -150,8 +150,11 @@ int main(int argc, char *argv[])
                 {
                     auto matches{
                         search::search(filepath, regex, search_settings)};
-                    std::lock_guard<std::mutex> guard(mutex_matches_all);
-                    matches_all.emplace_back(matches);
+                    if (!matches.empty())
+                    {
+                        std::lock_guard<std::mutex> guard(mutex_matches_all);
+                        matches_all.emplace_back(matches);
+                    }
                 }
                 catch (const zip::exception &e)
                 {