diff --git a/src/variables/global.h b/src/variables/global.h
index 8a040c29..bc591402 100644
--- a/src/variables/global.h
+++ b/src/variables/global.h
@@ -106,8 +106,8 @@ class Global_DynamicElement : public Variable {
             t->m_rules->m_secWebAppId.m_value);
     }
 
-    static void storeOrUpdateFirst(Transaction *t, std::string var,
-        std::string value) {
+    static void storeOrUpdateFirst(Transaction *t, const std::string &var,
+        const std::string &value) {
         t->m_collections.m_global_collection->storeOrUpdateFirst(
             var, t->m_collections.m_global_collection_key,
             t->m_rules->m_secWebAppId.m_value,
diff --git a/test/cppcheck_suppressions.txt b/test/cppcheck_suppressions.txt
index e1e398d4..356bc119 100644
--- a/test/cppcheck_suppressions.txt
+++ b/test/cppcheck_suppressions.txt
@@ -58,8 +58,6 @@ rethrowNoCurrentException:src/rule_with_actions.cc:127
 ctunullpointer:src/rule_with_actions.cc:244
 ctunullpointer:src/rule_with_operator.cc:135
 ctunullpointer:src/rule_with_operator.cc:95
-passedByValue:src/variables/global.h:109
-passedByValue:src/variables/global.h:110
 passedByValue:test/common/modsecurity_test.cc:49
 passedByValue:test/common/modsecurity_test.cc:98
 unreadVariable:src/rule_with_operator.cc:219