diff --git a/install.sh b/install.sh
index be84abc..9f01426 100644
--- a/install.sh
+++ b/install.sh
@@ -44,7 +44,7 @@ fi
 
 # GUI runtime libs (loaded at runtime by egui/winit). Warn if absent.
 missing=()
-for probe in libxcb.so.1 libxkbcommon.so.0 libGL.so.1 libwayland-client.so.0 libx11.so.6; do
+for probe in libxcb.so.1 libxkbcommon.so.0 libGL.so.1 libwayland-client.so.0 libX11.so.6; do
   ldconfig -p 2>/dev/null | grep -q "$probe" || missing+=("$probe")
 done
 if [ "${#missing[@]}" -gt 0 ]; then