diff --git a/Jamulus.pro b/Jamulus.pro
index e1ab05fd..c16ddf04 100755
--- a/Jamulus.pro
+++ b/Jamulus.pro
@@ -6,6 +6,16 @@ contains(CONFIG, "noupcasename") {
     TARGET = jamulus
 }
 
+# support multi-threading with OMP if requested
+contains(CONFIG, "multithreading") {
+    unix {
+        message(The OpenMP multithreading is enabled.)
+        DEFINES += USE_OMP
+        QMAKE_CXXFLAGS += -fopenmp
+        QMAKE_LFLAGS += -fopenmp
+    }
+}
+
 CONFIG += qt \
     thread \
     release
diff --git a/src/server.cpp b/src/server.cpp
index 0f2aa184..27d8f04a 100755
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -993,6 +993,9 @@ static CTimingMeas JitterMeas ( 1000, "test2.dat" ); JitterMeas.Measure(); // TE
                                                                  vecChannelLevels );
         }
 
+#ifdef USE_OMP
+# pragma omp parallel for
+#endif
         for ( int i = 0; i < iNumClients; i++ )
         {
             int                iClientFrameSizeSamples = 0; // initialize to avoid a compiler warning