diff --git a/sysprof-module.c b/sysprof-module.c
index 3ce65928..96cf43c6 100644
--- a/sysprof-module.c
+++ b/sysprof-module.c
@@ -304,10 +304,10 @@ on_timer(unsigned long dong)
 {
 	struct task_struct *p;
 
-	static const int cpu_profiler = 1; /* set to 0 to profile disk */
+	static const int cpu_profiler = 0; /* set to 0 to profile disk */
 	
 	for_each_process (p) {
-		if (p->state == cpu_profiler? TASK_RUNNING : TASK_UNINTERRUPTIBLE)
+		if (p->state == (cpu_profiler? TASK_RUNNING : TASK_UNINTERRUPTIBLE))
 			queue_generate_stack_trace (p);
 	}