diff --git a/source/gui/CGUISprite.cpp b/source/gui/CGUISprite.cpp
index 95315b23e6..4a0f525eca 100755
--- a/source/gui/CGUISprite.cpp
+++ b/source/gui/CGUISprite.cpp
@@ -15,6 +15,7 @@ void CGUISpriteInstance::Draw(CRect Size, int CellID, std::map<CStr, CGUISprite>
 void CGUISpriteInstance::Invalidate()
 {
 	m_CachedSize = CRect();
+	m_CachedCellID = -1;
 }
 
 bool CGUISpriteInstance::IsEmpty() const
@@ -27,6 +28,7 @@ bool CGUISpriteInstance::IsEmpty() const
 // of data):
 
 CGUISpriteInstance::CGUISpriteInstance()
+	: m_CachedCellID(-1)
 {
 }
 
diff --git a/source/ps/Interact.h b/source/ps/Interact.h
index b61e816993..dd3cffddca 100755
--- a/source/ps/Interact.h
+++ b/source/ps/Interact.h
@@ -122,6 +122,8 @@ struct CBuildingPlacer : public Singleton<CBuildingPlacer>
 	CBuildingPlacer()
 	{
 		m_active = false;
+		m_actor = 0;
+		m_bounds = 0;
 	}
 
 	CStrW m_templateName;