diff --git a/proctl/proctl_darwin.go b/proctl/proctl_darwin.go
index 38456cac..b0270379 100644
--- a/proctl/proctl_darwin.go
+++ b/proctl/proctl_darwin.go
@@ -111,7 +111,6 @@ func (dbp *DebuggedProcess) addThread(port int, attach bool) (*ThreadContext, er
 	if thread, ok := dbp.Threads[port]; ok {
 		return thread, nil
 	}
-	fmt.Println("new thread spawned", port)
 	thread := &ThreadContext{
 		Id:      port,
 		Process: dbp,
diff --git a/proctl/proctl_linux.go b/proctl/proctl_linux.go
index a88d94a3..0da0c105 100644
--- a/proctl/proctl_linux.go
+++ b/proctl/proctl_linux.go
@@ -65,7 +65,6 @@ func (dbp *DebuggedProcess) addThread(tid int, attach bool) (*ThreadContext, err
 	if thread, ok := dbp.Threads[tid]; ok {
 		return thread, nil
 	}
-	fmt.Println("new thread spawned", tid)
 
 	if attach {
 		err := sys.PtraceAttach(tid)