diff --git a/code/nel/src/3d/packed_zone.cpp b/code/nel/src/3d/packed_zone.cpp
index aa3eff11f..72866ea78 100644
--- a/code/nel/src/3d/packed_zone.cpp
+++ b/code/nel/src/3d/packed_zone.cpp
@@ -492,7 +492,7 @@ static void computeRastersUnion(const CPolygon2D::TRasterVect &inRaster0, CPolyg
 	{
 		if (inRaster1.empty())
 		{
-			outRaster.empty();
+			outRaster.clear();
 			finalMinY = -1;
 			return;
 		}