diff --git a/C/threadpi.c b/C/threadpi.c
index 7af8afacc7306918ff04917ed37bd7470491a20a..9f32ea6336543552ea834517cc947682a424611d 100644
--- a/C/threadpi.c
+++ b/C/threadpi.c
@@ -10,7 +10,7 @@
 #include <time.h>
 #include <pthread.h>
 
-unsigned int npts = 1e9;
+unsigned int npts = 1e8;
 double pi = 0;
 pthread_mutex_t mutex;