diff --git a/libs/main/containers/pivector2d.h b/libs/main/containers/pivector2d.h
index 85524325..807a45ae 100644
--- a/libs/main/containers/pivector2d.h
+++ b/libs/main/containers/pivector2d.h
@@ -103,7 +103,7 @@ public:
 			return *this;
 		}
 		inline Row & operator=(const PIVector<T> & other) {
-			const size_t sz = piMin<size_t>(sz, other.size());
+			const size_t sz = piMin<size_t>(sz_, other.size());
 			p_->_copyRaw(p_->data(st_), other.data(), sz);
 			return *this;
 		}