diff --git a/.hgignore b/.hgignore
index 964b22bd9..e4e0caada 100644
--- a/.hgignore
+++ b/.hgignore
@@ -22,3 +22,4 @@ CPackSourceConfig.cmake
 Makefile
 cmake_install.cmake
 src/jthread/libjthread.a
+data_temp/*