diff --git a/build_tools/lsan_suppressions.txt b/build_tools/lsan_suppressions.txt
index 2ba5ddae6..0e44fe481 100644
--- a/build_tools/lsan_suppressions.txt
+++ b/build_tools/lsan_suppressions.txt
@@ -4,3 +4,4 @@ leak:AsanThread
 
 # ncurses leaks allocations freely as it assumes it will be running throughout. Ignore these.
 leak:tparm
+leak:_nc_doalloc