diff --git a/scene/gui/item_list.cpp b/scene/gui/item_list.cpp
index 82f089735d3..c44feddd388 100644
--- a/scene/gui/item_list.cpp
+++ b/scene/gui/item_list.cpp
@@ -1550,6 +1550,7 @@ bool ItemList::get_allow_reselect() const {
 }
 
 void ItemList::set_icon_scale(real_t p_scale) {
+	ERR_FAIL_COND(!Math::is_finite(p_scale));
 	icon_scale = p_scale;
 }