diff --git a/fairmq/FairMQLogger.cxx b/fairmq/FairMQLogger.cxx
index c21414f8..28c6c606 100644
--- a/fairmq/FairMQLogger.cxx
+++ b/fairmq/FairMQLogger.cxx
@@ -72,3 +72,9 @@ void FairMQLogger::Log(int type, std::string logmsg)
   std::cout << "[\033[01;36m" <<  mbstr << fractional_seconds << "\033[0m]" << "[" << type_str << "]" << " " << logmsg << std::endl;
 }
 
+timestamp_t get_timestamp ()
+{
+  struct timeval now;
+  gettimeofday (&now, NULL);
+  return now.tv_usec + (timestamp_t)now.tv_sec * 1000000;
+}
\ No newline at end of file
diff --git a/fairmq/FairMQLogger.h b/fairmq/FairMQLogger.h
index c76d125e..1dc44b24 100644
--- a/fairmq/FairMQLogger.h
+++ b/fairmq/FairMQLogger.h
@@ -32,11 +32,6 @@ class FairMQLogger
 
 typedef unsigned long long timestamp_t;
 
-static timestamp_t get_timestamp ()
-{
-  struct timeval now;
-  gettimeofday (&now, NULL);
-  return now.tv_usec + (timestamp_t)now.tv_sec * 1000000;
-}
+timestamp_t get_timestamp ();
 
 #endif /* FAIRMQLOGGER_H_ */