diff --git a/lib/rmg/CZonePlacer.cpp b/lib/rmg/CZonePlacer.cpp
index fe72425e1..8c185a10e 100644
--- a/lib/rmg/CZonePlacer.cpp
+++ b/lib/rmg/CZonePlacer.cpp
@@ -349,10 +349,11 @@ void CZonePlacer::placeOnGrid(CRandomGenerator* rand)
 			auto zone = grid[x][y];
 			if (zone)
 			{
-				auto targetX = rand->nextDouble(x - 0.5f, x + 0.5f);
-				vstd::clamp(targetX, 0, gridSize);
-				auto targetY = rand->nextDouble(y - 0.5f, y + 0.5f);
-				vstd::clamp(targetY, 0, gridSize);
+				//i.e. for grid size 5 we get range (0.5 - 4.5)
+				auto targetX = rand->nextDouble(x + 0.5f, x + 0.5f);
+				vstd::clamp(targetX, 0.5, gridSize - 0.5);
+				auto targetY = rand->nextDouble(y + 0.5f, y + 0.5f);
+				vstd::clamp(targetY, 0.5, gridSize - 0.5);
 
 				zone->setCenter(float3(targetX / gridSize, targetY / gridSize, zone->getPos().z));
 			}