diff --git a/source/Irrlicht/CBillboardSceneNode.cpp b/source/Irrlicht/CBillboardSceneNode.cpp
index c1776d4..b61a8ea 100644
--- a/source/Irrlicht/CBillboardSceneNode.cpp
+++ b/source/Irrlicht/CBillboardSceneNode.cpp
@@ -162,7 +162,7 @@ void CBillboardSceneNode::setSize(const core::dimension2d<f32>& size)
 	if (core::equals(Size.Height, 0.0f))
 		Size.Height = 1.0f;
 
-	const f32 extent = 0.5f*sqrt(Size.Width*Size.Width + Size.Height*Size.Height);
+	const f32 extent = 0.5f*sqrtf(Size.Width*Size.Width + Size.Height*Size.Height);
 	BBoxSafe.MinEdge.set(-extent,-extent,-extent);
 	BBoxSafe.MaxEdge.set(extent,extent,extent);
 }
@@ -182,7 +182,7 @@ void CBillboardSceneNode::setSize(f32 height, f32 bottomEdgeWidth, f32 topEdgeWi
 		TopEdgeWidth = 1.0f;
 	}
 
-	const f32 extent = 0.5f*sqrt(Size.Width*Size.Width + Size.Height*Size.Height);
+	const f32 extent = 0.5f*sqrtf(Size.Width*Size.Width + Size.Height*Size.Height);
 	BBoxSafe.MinEdge.set(-extent,-extent,-extent);
 	BBoxSafe.MaxEdge.set(extent,extent,extent);
 }