diff --git a/(p,t)_sparsification/main.cpp b/(p,t)_sparsification/main.cpp
index 52e253e508472628aa4ffe385e068e228bf13df0..7f50989e9c8e79fe1697910667240a7d8fb84d3c 100644
--- a/(p,t)_sparsification/main.cpp
+++ b/(p,t)_sparsification/main.cpp
@@ -6,7 +6,7 @@
 #include <string>
 #include "hash.h"
 #include <omp.h>
-
+#include <thread>
 
 #define NUM_TRIALS 10