diff --git a/core/ormlinkset.class.inc.php b/core/ormlinkset.class.inc.php
index f39863755..937d65ba0 100644
--- a/core/ormlinkset.class.inc.php
+++ b/core/ormlinkset.class.inc.php
@@ -374,7 +374,7 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 	 * @throws \MySQLException
 	 * @throws \MySQLHasGoneAwayException
 	 */
-	public function current()
+	public function current(): mixed
 	{
 		$this->LoadOriginalIds();
 
@@ -409,7 +409,7 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 	 * @throws \CoreUnexpectedValue
 	 * @throws \MySQLException
 	 */
-	public function next()
+	public function next(): void
 	{
 		$this->LoadOriginalIds();
 
@@ -439,7 +439,7 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 	 * @link http://php.net/manual/en/iterator.key.php
 	 * @return mixed scalar on success, or null on failure.
 	 */
-	public function key()
+	public function key(): mixed
 	{
 		return $this->iCursor;
 	}
@@ -454,7 +454,7 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 	 * @throws \CoreUnexpectedValue
 	 * @throws \MySQLException
 	 */
-	public function valid()
+	public function valid(): bool
 	{
 		$this->LoadOriginalIds();
 
@@ -472,7 +472,7 @@ class ormLinkSet implements iDBObjectSetIterator, Iterator, SeekableIterator
 	 * @throws \CoreUnexpectedValue
 	 * @throws \MySQLException
 	 */
-	public function rewind()
+	public function rewind(): void
 	{
 	    $this->LoadOriginalIds();
 
diff --git a/core/simplegraph.class.inc.php b/core/simplegraph.class.inc.php
index 979992efb..1c5304d1a 100644
--- a/core/simplegraph.class.inc.php
+++ b/core/simplegraph.class.inc.php
@@ -745,27 +745,27 @@ class RelationTypeIterator implements Iterator
 		}
 	}
 	
-	public function rewind()
+	public function rewind(): void
 	{
 		$this->iCurrentIdx = 0;
 	}
 	
-	public function valid()
+	public function valid(): bool
 	{
 		return array_key_exists($this->iCurrentIdx, $this->aList);
 	}
 	
-	public function next()
+	public function next(): void
 	{
 		$this->iCurrentIdx++;
 	}
 	
-	public function current()
+	public function current(): mixed
 	{
 		return $this->aList[$this->iCurrentIdx];
 	}
 	
-	public function key()
+	public function key(): mixed
 	{
 		return $this->iCurrentIdx;
 	}