diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index b07db889c..f19185f9e 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1709,7 +1709,9 @@ namespace Skirt {
             //FIXME infinite or high skirt does not make sense for sequential print!
             (skirt_done.size() < (size_t)print.config().skirt_height.value || print.has_infinite_skirt()) &&
             // This print_z has not been extruded yet (sequential print)
-            skirt_done.back() < layer_tools.print_z - EPSILON &&
+            // FIXME: The skirt_done should not be empty at this point. The check is a workaround
+            // of https://github.com/prusa3d/PrusaSlicer/issues/5652, but it deserves a real fix.
+            (! skirt_done.empty() && skirt_done.back() < layer_tools.print_z - EPSILON) &&
             // and this layer is an object layer, or it is a raft layer.
             (layer_tools.has_object || support_layer->id() < (size_t)support_layer->object()->config().raft_layers.value)) {
 #if 0