diff --git a/common/JackClient.cpp b/common/JackClient.cpp
index 61ea842f..d1818f1d 100644
--- a/common/JackClient.cpp
+++ b/common/JackClient.cpp
@@ -29,7 +29,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #include <math.h>
 #include <string>
 
-int verbose = 0;
+//int verbose = 0;
 
 using namespace std;
 
diff --git a/common/JackError.c b/common/JackError.c
index ed463e5f..251ff969 100644
--- a/common/JackError.c
+++ b/common/JackError.c
@@ -22,6 +22,8 @@
 #include <stdio.h>
 #include "JackError.h"
 
+int verbose = 0;
+
 EXPORT void jack_error (const char *fmt, ...)
 {
 	va_list ap;
diff --git a/tests/testAtomic.cpp b/tests/testAtomic.cpp
index 211ce0e5..52fc8df2 100644
--- a/tests/testAtomic.cpp
+++ b/tests/testAtomic.cpp
@@ -25,7 +25,7 @@
 
 using namespace Jack;
 
-int verbose = 0;
+//int verbose = 0;
 
 #define SIZE 1024
 
diff --git a/tests/testSem.cpp b/tests/testSem.cpp
index 3cc7c7f0..1e531ccc 100644
--- a/tests/testSem.cpp
+++ b/tests/testSem.cpp
@@ -32,7 +32,7 @@
 
 #define ITER 500000
 
-int verbose = 0;
+//int verbose = 0;
 
 using namespace Jack;
 
diff --git a/tests/testSynchroClient.cpp b/tests/testSynchroClient.cpp
index cb42a0ff..7a5a2058 100644
--- a/tests/testSynchroClient.cpp
+++ b/tests/testSynchroClient.cpp
@@ -57,7 +57,7 @@
 
 using namespace Jack;
 
-int verbose = 0;
+//int verbose = 0;
 
 class Test2 : public JackRunnableInterface
 {
diff --git a/tests/testSynchroServer.cpp b/tests/testSynchroServer.cpp
index e5c480f9..fb524b76 100644
--- a/tests/testSynchroServer.cpp
+++ b/tests/testSynchroServer.cpp
@@ -55,7 +55,7 @@
 #define SERVER "serveur3"
 #define CLIENT "client3"
 
-int verbose = 0;
+//int verbose = 0;
 
 using namespace Jack;
 
diff --git a/tests/testSynchroServerClient.cpp b/tests/testSynchroServerClient.cpp
index b6eac268..4761acee 100644
--- a/tests/testSynchroServerClient.cpp
+++ b/tests/testSynchroServerClient.cpp
@@ -56,7 +56,7 @@
 #define SERVER "serveur1"
 #define CLIENT "client1"
 
-int verbose = 0;
+//int verbose = 0;
 
 using namespace Jack;