diff --git a/servers/rendering/renderer_rd/storage_rd/light_storage.cpp b/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
index 2786af65ebc1..9a4f69772f2d 100644
--- a/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
@@ -2003,7 +2003,7 @@ void LightStorage::shadow_atlas_set_size(RID p_atlas, int p_size, bool p_16_bits
 	for (int i = 0; i < 4; i++) {
 		//clear subdivisions
 		shadow_atlas->quadrants[i].shadows.clear();
-		shadow_atlas->quadrants[i].shadows.resize(int64_t(1) << int64_t(shadow_atlas->quadrants[i].subdivision));
+		shadow_atlas->quadrants[i].shadows.resize(shadow_atlas->quadrants[i].subdivision * shadow_atlas->quadrants[i].subdivision);
 	}
 
 	//erase shadow atlas reference from lights