diff --git a/elaborate.cc b/elaborate.cc
index 2c593336b..ca5545859 100644
--- a/elaborate.cc
+++ b/elaborate.cc
@@ -180,7 +180,7 @@ void PGAssign::elaborate(Design*des, NetScope*scope) const
 	 * source is a bit, part, indexed select or a concatenation we need
 	 * to add a driver (BUFZ) to convey the strength information. */
       if ((drive0 != IVL_DR_STRONG || drive1 != IVL_DR_STRONG) &&
-          ((dynamic_cast<NetESelect*>(rval_expr)) || 
+          ((dynamic_cast<NetESelect*>(rval_expr)) ||
 	   (dynamic_cast<NetEConcat*>(rval_expr)))) {
 	    need_driver_flag = true;
       }