diff --git a/src/libCom/test/blockingSockTest.cpp b/src/libCom/test/blockingSockTest.cpp
index 039a2625a..6646cb190 100644
--- a/src/libCom/test/blockingSockTest.cpp
+++ b/src/libCom/test/blockingSockTest.cpp
@@ -201,7 +201,7 @@ const char * serverCircuit::pName ()
     return "server circuit";
 }
 
-void blockingSockTest ()
+extern "C" void blockingSockTest (void)
 {
     address addr;
     memset ( (char *) & addr, 0, sizeof ( addr ) );
diff --git a/src/libCom/test/blockingSockTestMain.cpp b/src/libCom/test/blockingSockTestMain.cpp
index 843e665f0..01f5b9b31 100644
--- a/src/libCom/test/blockingSockTestMain.cpp
+++ b/src/libCom/test/blockingSockTestMain.cpp
@@ -1,5 +1,4 @@
-
-void blockingSockTest ();
+extern "C" void blockingSockTest (void); 
 
 int main ()
 {