diff --git a/src/simulation/Air.cpp b/src/simulation/Air.cpp
index c928fdd5a8..81bb267368 100644
--- a/src/simulation/Air.cpp
+++ b/src/simulation/Air.cpp
@@ -359,8 +359,8 @@ Air::Air(Simulation & simulation):
 {
 	//Simulation should do this.
 	make_kernel();
-	std::fill(&bmap_blockair[0][0], &bmap_blockairh[0][0]+((XRES/CELL)*(YRES/CELL)), 0);
-	std::fill(&bmap_blockairh[0][0], &bmap_blockair[0][0]+((XRES/CELL)*(YRES/CELL)), 0);
+	std::fill(&bmap_blockair[0][0], &bmap_blockair[0][0]+((XRES/CELL)*(YRES/CELL)), 0);
+	std::fill(&bmap_blockairh[0][0], &bmap_blockairh[0][0]+((XRES/CELL)*(YRES/CELL)), 0);
 	std::fill(&vx[0][0], &vx[0][0]+((XRES/CELL)*(YRES/CELL)), 0.0f);
 	std::fill(&ovx[0][0], &ovx[0][0]+((XRES/CELL)*(YRES/CELL)), 0.0f);
 	std::fill(&vy[0][0], &vy[0][0]+((XRES/CELL)*(YRES/CELL)), 0.0f);