diff --git a/scene/gui/flow_container.cpp b/scene/gui/flow_container.cpp
index a1ee55c5e..42da6dfc5 100644
--- a/scene/gui/flow_container.cpp
+++ b/scene/gui/flow_container.cpp
@@ -243,6 +243,8 @@ int FlowContainer::get_line_count() const {
 
 FlowContainer::FlowContainer(bool p_vertical) {
 	vertical = p_vertical;
+	cached_size = 0;
+	cached_line_count = 0;
 }
 
 void FlowContainer::_bind_methods() {