diff --git a/include/dlaf/matrix/distribution.h b/include/dlaf/matrix/distribution.h
index 15ddd4cc71..aea2e6b352 100644
--- a/include/dlaf/matrix/distribution.h
+++ b/include/dlaf/matrix/distribution.h
@@ -431,7 +431,7 @@ class Distribution {
 
   template <Coord rc>
   SizeType tileSize(SizeType global_tile) const noexcept {
-    DLAF_ASSERT_HEAVY(0 <= global_tile && global_tile <= global_nr_tiles_.get<rc>(), global_tile,
+    DLAF_ASSERT_HEAVY(0 <= global_tile && global_tile < global_nr_tiles_.get<rc>(), global_tile,
                       global_nr_tiles_.get<rc>());
     SizeType n = size_.get<rc>();
     SizeType nb = tile_size_.get<rc>();