diff --git a/core/base/segmented_array.hpp b/core/base/segmented_array.hpp
index ffa4d62e74a..c77d7110e00 100644
--- a/core/base/segmented_array.hpp
+++ b/core/base/segmented_array.hpp
@@ -29,7 +29,7 @@ struct device_segmented_array {
         T* end;
     };
 
-    constexpr segment get_segment(size_type segment_id)
+    constexpr segment get_segment(size_type segment_id) const
     {
         GKO_ASSERT(segment_id < (offsets_end - offsets_begin));
         return {flat_begin + offsets_begin[segment_id],