diff --git a/res/layouts/ingame_chat.xml b/res/layouts/ingame_chat.xml
index 45ad4749..e7c3a52c 100644
--- a/res/layouts/ingame_chat.xml
+++ b/res/layouts/ingame_chat.xml
@@ -1,5 +1,5 @@
 <panel size="300,0" margin="0,0,0,70" max-length='300' min-length='0'
-       size-func="gui.get_viewport()[1]/2,-1"
+       size-func="gui.get_viewport()[1]/2,0"
        padding="0"
        min-size="0"
        color="0"
diff --git a/src/graphics/ui/elements/UINode.cpp b/src/graphics/ui/elements/UINode.cpp
index 08316e32..ac59fbb5 100644
--- a/src/graphics/ui/elements/UINode.cpp
+++ b/src/graphics/ui/elements/UINode.cpp
@@ -300,11 +300,13 @@ const std::string& UINode::getId() const {
 
 void UINode::reposition() {
     if (sizefunc) {
-        auto newSize = sizefunc();
-        auto defsize = newSize;
+        glm::ivec2 newSize = sizefunc();
+        glm::ivec2 defsize = newSize;
         if (parent) {
             defsize = parent->getSize();
         }
+        newSize.x = newSize.x == 0 ? size.x : newSize.x;
+        newSize.y = newSize.y == 0 ? size.y : newSize.y;
         setSize(
             {newSize.x < 0 ? defsize.x + (newSize.x + 1) : newSize.x,
              newSize.y < 0 ? defsize.y + (newSize.y + 1) : newSize.y}