diff --git a/src/plugins/instrumentation/extrae.cpp b/src/plugins/instrumentation/extrae.cpp
index 9c186c8c1a29c303c52bcb842a842a8663c9a58e..225ee0c0956ba5625ddd3bf066b82e3dba6c0194 100644
--- a/src/plugins/instrumentation/extrae.cpp
+++ b/src/plugins/instrumentation/extrae.cpp
@@ -288,6 +288,7 @@ class InstrumentationExtrae: public Instrumentation
 
         /* Keep current number of threads */
         _maxThreads = sys.getSMPPlugin()->getNumThreads();
+        Extrae_change_num_threads( _maxThreads );
       }
       void doLs(std::string dest)
       {