diff --git a/modcc/symdiff.cpp b/modcc/symdiff.cpp
index 7a634434cd85bdcab48113fb9c1e8cb220d81379..36e98c6943eda5172771acbef44605c46b465ff5 100644
--- a/modcc/symdiff.cpp
+++ b/modcc/symdiff.cpp
@@ -29,9 +29,9 @@ public:
     }
 
     void visit(CallExpression* e) override {
-        for (auto& e: e->args()) {
+        for (auto& expr: e->args()) {
             if (found()) return;
-            e->accept(this);
+            expr->accept(this);
         }
     }
 
@@ -62,16 +62,16 @@ public:
     }
 
     void visit(StoichExpression* e) override {
-        for (auto& e: e->terms()) {
+        for (auto& expr: e->terms()) {
             if (found()) return;
-            e->accept(this);
+            expr->accept(this);
         }
     }
 
     void visit(BlockExpression* e) override {
-        for (auto& e: e->statements()) {
+        for (auto& expr: e->statements()) {
             if (found()) return;
-            e->accept(this);
+            expr->accept(this);
         }
     }