diff --git a/src/ExprNode.cc b/src/ExprNode.cc
index 870be77f..97300e1b 100644
--- a/src/ExprNode.cc
+++ b/src/ExprNode.cc
@@ -5833,9 +5833,9 @@ void
 BinaryOpNode::findConstantEquations(map<VariableNode *, NumConstNode *> &table) const
 {
   if (op_code == BinaryOpcode::equal)
-    if (dynamic_cast<VariableNode *>(arg1) != nullptr && dynamic_cast<NumConstNode *>(arg2) != nullptr)
+    if (dynamic_cast<VariableNode *>(arg1) && dynamic_cast<NumConstNode *>(arg2))
       table[dynamic_cast<VariableNode *>(arg1)] = dynamic_cast<NumConstNode *>(arg2);
-    else if (dynamic_cast<VariableNode *>(arg2) != nullptr && dynamic_cast<NumConstNode *>(arg1) != nullptr)
+    else if (dynamic_cast<VariableNode *>(arg2) && dynamic_cast<NumConstNode *>(arg1))
       table[dynamic_cast<VariableNode *>(arg2)] = dynamic_cast<NumConstNode *>(arg1);
   else
     {