diff --git a/tp/tp5/src/pi.c b/tp/tp5/src/pi.c
index 08856a5..00b463a 100644
--- a/tp/tp5/src/pi.c
+++ b/tp/tp5/src/pi.c
@@ -4,7 +4,13 @@
 #include<signal.h>
 #include<stdint.h>
 #include<assert.h>
-#include "helpers.h"
+
+double tstamp(void) {                                                                                    
+	struct timespec tv;
+	clock_gettime(CLOCK_REALTIME, &tv);
+	return tv.tv_sec + tv.tv_nsec * 1.0e-9;
+}
+
 
 
 uint64_t shots = 0,