diff --git a/common/JackClient.cpp b/common/JackClient.cpp
index 7334a57a..bcb06ead 100644
--- a/common/JackClient.cpp
+++ b/common/JackClient.cpp
@@ -39,9 +39,6 @@ namespace Jack
 
 #define IsRealTime() ((fProcess != NULL) | (fThreadFun != NULL) | (fSync != NULL) | (fTimebase != NULL))
 
-JackClient::JackClient():fThread(this)
-{}
-
 JackClient::JackClient(JackSynchro* table):fThread(this)
 {
     fSynchroTable = table;
diff --git a/common/JackClient.h b/common/JackClient.h
index 3013334b..b6e78ef3 100644
--- a/common/JackClient.h
+++ b/common/JackClient.h
@@ -124,7 +124,6 @@ class SERVER_EXPORT JackClient : public JackClientInterface, public JackRunnable
 
     public:
 
-        JackClient();
         JackClient(JackSynchro* table);
         virtual ~JackClient();
 
diff --git a/common/JackDebugClient.cpp b/common/JackDebugClient.cpp
index 3308c457..7c1f539a 100644
--- a/common/JackDebugClient.cpp
+++ b/common/JackDebugClient.cpp
@@ -35,6 +35,7 @@ namespace Jack
 {
 
 JackDebugClient::JackDebugClient(JackClient * client)
+  : JackClient(client->fSynchroTable)
 {
     fTotalPortNumber = 1;       // The total number of port opened and maybe closed. Historical view.
     fOpenPortNumber = 0;        // The current number of opened port.
diff --git a/example-clients/tw.c b/example-clients/tw.c
index 623ff240..edc7ef31 100644
--- a/example-clients/tw.c
+++ b/example-clients/tw.c
@@ -9,6 +9,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
 
 #include <jack/jack.h>
 
diff --git a/tests/test.cpp b/tests/test.cpp
index 8a8a8117..d2ef9a05 100644
--- a/tests/test.cpp
+++ b/tests/test.cpp
@@ -479,7 +479,7 @@ int process4(jack_nframes_t nframes, void *arg)
 	jack_nframes_t delta_time = cur_time - last_time;
 
 	Log("calling process4 callback : jack_frame_time = %ld delta_time = %ld\n", cur_time, delta_time);
-	if (delta_time > 0  && (jack_nframes_t)abs(delta_time - cur_buffer_size) > tolerance) {
+	if (delta_time > 0  && abs((int64_t)delta_time - (int64_t)cur_buffer_size) > (int64_t)tolerance) {
 		printf("!!! ERROR !!! jack_frame_time seems to return incorrect values cur_buffer_size = %d, delta_time = %d tolerance %d\n", cur_buffer_size, delta_time, tolerance);
 	}