diff --git a/testsuite/tests/concurrent/should_run/hs_try_putmvar002_c.c b/testsuite/tests/concurrent/should_run/hs_try_putmvar002_c.c
index 34a339da93b5d7e7d67255b072daa0cd8d3a5998..79076e6497c2e425913c1b6041069e21ba506187 100644
--- a/testsuite/tests/concurrent/should_run/hs_try_putmvar002_c.c
+++ b/testsuite/tests/concurrent/should_run/hs_try_putmvar002_c.c
@@ -1,6 +1,5 @@
 #include "HsFFI.h"
 #include <unistd.h>
-#include <pthread.h>
 #include "hs_try_putmvar002_stub.h"
 
 void externalPutMVar(HsStablePtr mvar, HsInt cap)