diff --git a/src/slic3r/GUI/ImGuiWrapper.cpp b/src/slic3r/GUI/ImGuiWrapper.cpp
index 93dbb1c8c..f64666d7b 100644
--- a/src/slic3r/GUI/ImGuiWrapper.cpp
+++ b/src/slic3r/GUI/ImGuiWrapper.cpp
@@ -273,10 +273,10 @@ bool ImGuiWrapper::update_key_data(wxKeyEvent &evt)
     if (type == wxEVT_CHAR) {
         // Char event
         const auto   key   = evt.GetUnicodeKey();
-        unsigned int key_u = static_cast<unsigned int>(key);
 
         // Release BackSpace, Delete, ... when miss wxEVT_KEY_UP event
         // Already Fixed at begining of new frame
+        // unsigned int key_u = static_cast<unsigned int>(key);
         //if (key_u >= 0 && key_u < IM_ARRAYSIZE(io.KeysDown) && io.KeysDown[key_u]) { 
         //    io.KeysDown[key_u] = false;
         //}
diff --git a/src/slic3r/GUI/NotificationManager.cpp b/src/slic3r/GUI/NotificationManager.cpp
index b440b84de..1138163fb 100644
--- a/src/slic3r/GUI/NotificationManager.cpp
+++ b/src/slic3r/GUI/NotificationManager.cpp
@@ -1135,7 +1135,7 @@ void NotificationManager::PrintHostUploadNotification::generate_text()
 		line1 = shorten_to_line(m_filename, true);
 	} else  {
 		line1 = shorten_to_line(m_filename + rest, false);
-		int over = line1.size() - m_filename.size();
+		size_t over = line1.size() - m_filename.size();
 		if (over < 0)
 			over = 0;
 		if (over < rest.size())
diff --git a/src/slic3r/Utils/OctoPrint.cpp b/src/slic3r/Utils/OctoPrint.cpp
index 48ad44033..d1e59cd2b 100644
--- a/src/slic3r/Utils/OctoPrint.cpp
+++ b/src/slic3r/Utils/OctoPrint.cpp
@@ -716,7 +716,7 @@ bool PrusaLink::get_storage(wxArrayString& output) const
             res = true;
        
     })
-    .on_complete([&, this](std::string body, unsigned) {
+    .on_complete([&](std::string body, unsigned) {
         BOOST_LOG_TRIVIAL(debug) << boost::format("%1%: Got storage: %2%") % name % body;
         try
         {
@@ -968,7 +968,6 @@ bool PrusaLink::upload_inner_with_host(PrintHostUpload upload_data, ProgressFn p
     }
 
     std::string url;
-    bool res = true;
     std::string storage_path = (use_put ? "api/v1/files" : "api/files");
     storage_path += (upload_data.storage.empty() ? "/local" : upload_data.storage);
 #ifdef WIN32
diff --git a/src/slic3r/Utils/Repetier.cpp b/src/slic3r/Utils/Repetier.cpp
index ad3c1a029..e266be1f8 100644
--- a/src/slic3r/Utils/Repetier.cpp
+++ b/src/slic3r/Utils/Repetier.cpp
@@ -73,7 +73,7 @@ bool Repetier::test(wxString &msg) const
             res = false;
             msg = format_error(body, error, status);
         })
-        .on_complete([&, this](std::string body, unsigned) {
+        .on_complete([&](std::string body, unsigned) {
             BOOST_LOG_TRIVIAL(debug) << boost::format("%1%: Got version: %2%") % name % body;
 
             try {