diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd569543..d341c6c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ endif()
 
 # Define project
 project(Monitoring
-  VERSION 3.7.0
+  VERSION 3.7.1
   DESCRIPTION "O2 Monitoring library"
   LANGUAGES CXX
 )
diff --git a/src/Backends/ApMonBackend.cxx b/src/Backends/ApMonBackend.cxx
index e415f5e3..8204f471 100644
--- a/src/Backends/ApMonBackend.cxx
+++ b/src/Backends/ApMonBackend.cxx
@@ -68,7 +68,7 @@ void ApMonBackend::send(const Metric& metric)
     entity += '=';
     (value > 0) ? entity += tags::GetValue(value) : entity += std::to_string(0 - value);
   }
-  if (mRunNumber != 0) convert << ",run=" << mRunNumber;
+  if (mRunNumber != 0) entity += (",run=" + std::to_string(mRunNumber));
 
   int valueSize = metric.getValuesSize();
   char **paramNames, **paramValues;