diff --git a/brick/model.sdf b/brick/model.sdf
index 8d14715..84c81c9 100755
--- a/brick/model.sdf
+++ b/brick/model.sdf
@@ -27,7 +27,7 @@
             <ode>
               <mu>100</mu>
               <mu2>50</mu2>
-              <fdir1>0 0 1</fdir1>
+              <fdir1>1 0 1</fdir1>
               <slip1>0.0</slip1>
               <slip2>0.0</slip2>
             </ode>