diff --git a/fortuna.cpp b/fortuna.cpp
index ee662ac..cf43681 100644
--- a/fortuna.cpp
+++ b/fortuna.cpp
@@ -46,7 +46,7 @@ Fortuna::~Fortuna() noexcept {
 	if (th_gen.joinable()) {
 		th_gen.join();
 	}
-	if (th_gen.joinable()) {
+	if (th_accu.joinable()) {
 		th_accu.join();
 	}
 	if (th_sfm.joinable()) {