diff --git a/src/blackmisc/db/artifactlist.cpp b/src/blackmisc/db/artifactlist.cpp
index 87299ff18..3ff430165 100644
--- a/src/blackmisc/db/artifactlist.cpp
+++ b/src/blackmisc/db/artifactlist.cpp
@@ -194,7 +194,7 @@ namespace BlackMisc
         qint64 CArtifactList::getTotalFileSize() const
         {
             qint64 s = 0;
-            for (const CArtifact a : *this)
+            for (const CArtifact &a : *this)
             {
                 s += a.getFileSize();
             }
diff --git a/src/blackmisc/network/user.cpp b/src/blackmisc/network/user.cpp
index 2bdf609a4..1cbf1ddf5 100644
--- a/src/blackmisc/network/user.cpp
+++ b/src/blackmisc/network/user.cpp
@@ -166,7 +166,7 @@ namespace BlackMisc
 
             int uc = 0;
             int lc = 0;
-            for (const QChar ch : realName)
+            for (const QChar &ch : realName)
             {
                 // Joe Doe -> valid
                 // jOE dOE -> invalid