diff --git a/src/slic3r/GUI/ImGuiWrapper.cpp b/src/slic3r/GUI/ImGuiWrapper.cpp
index f58266a5d..8e4d9eebf 100644
--- a/src/slic3r/GUI/ImGuiWrapper.cpp
+++ b/src/slic3r/GUI/ImGuiWrapper.cpp
@@ -354,7 +354,7 @@ bool ImGuiWrapper::undo_redo_list(const ImVec2& size, const bool is_undo, bool (
         ImGui::Selectable(item_text, i < hovered);
 
         if (ImGui::IsItemHovered()) {
-            ImGui::SetTooltip(item_text);
+            ImGui::SetTooltip("%s", item_text);
             hovered = i;
             is_hovered = true;
         }