diff --git a/Testsuite/test/run_testsuite_with_cmake b/Testsuite/test/run_testsuite_with_cmake
index f079a20f674..2b69d253119 100755
--- a/Testsuite/test/run_testsuite_with_cmake
+++ b/Testsuite/test/run_testsuite_with_cmake
@@ -71,7 +71,7 @@ wait_for_process()
 	    kill -HUP $pid
 	    sleep 10
 	    # If SIGHUP was not enough, SIGKILL will finish the job, 10s after.
-	    kill -KILL $pid
+	    kill -KILL -$pid
 	fi
         return 1  
     fi