diff --git a/implot_demo.cpp b/implot_demo.cpp
index af5a07d..95c0e65 100644
--- a/implot_demo.cpp
+++ b/implot_demo.cpp
@@ -669,7 +669,7 @@ void ShowDemoWindow(bool* p_open) {
             paused = !paused;
         ImGui::Separator();
         for (int i = 0; i < K_CHANNELS; ++i) {
-            char label[K_CHANNELS];
+            char label[8];
             sprintf(label, show[i] ? "data_%d*" : "data_%d", i);
             ImGui::Selectable(label, false, 0, ImVec2(100, 0));
             if (ImGui::BeginDragDropSource(ImGuiDragDropFlags_None)) {
@@ -937,4 +937,4 @@ void ShowDemoWindow(bool* p_open) {
     ImGui::End();
 }
 
-} // namespace ImPlot
\ No newline at end of file
+} // namespace ImPlot