1 files changed, 3 insertions, 3 deletions
diff --git a/Source/Diagnostics/Diagnostics.cpp b/Source/Diagnostics/Diagnostics.cpp
index 277510f03..25da0f464 100644
--- a/Source/Diagnostics/Diagnostics.cpp
+++ b/Source/Diagnostics/Diagnostics.cpp
@@ -187,9 +187,9 @@ Diagnostics::BaseReadParameters ()
 
     m_varnames = m_varnames_fields;
     // Generate names of averaged particle fields and append to m_varnames
-    for (int ivar=0; ivar<m_pfield_varnames.size(); ivar++) {
-        for (int ispec=0; ispec < int(m_pfield_species.size()); ispec++) {
-            m_varnames.push_back(m_pfield_varnames[ivar] + '_' + m_pfield_species[ispec]);
+    for (const auto& fname : m_pfield_varnames) {
+        for (const auto& sname : m_pfield_species) {
+            m_varnames.push_back(fname + '_' + sname);
         }
     }