diff --git a/libs/util/include/psemek/util/spatial_array.hpp b/libs/util/include/psemek/util/spatial_array.hpp
index c0b60c1a..eec15f10 100644
--- a/libs/util/include/psemek/util/spatial_array.hpp
+++ b/libs/util/include/psemek/util/spatial_array.hpp
@@ -151,6 +151,9 @@ namespace psemek::util
 		}
 
 		array<T, N> new_array(new_size);
+		for (auto & v : new_array)
+			v = T{};
+
 		for (auto idx : array_.indices())
 		{
 			std::array<std::size_t, N> new_idx;