diff --git a/.hgignore b/.hgignore
index 964b22bd928c0e46c37487ecf520e95b89b4ef3c..e4e0caadab21cf9f9e86e23d888664ead4c3dea9 100644
--- a/.hgignore
+++ b/.hgignore
@@ -22,3 +22,4 @@ CPackSourceConfig.cmake
 Makefile
 cmake_install.cmake
 src/jthread/libjthread.a
+data_temp/*