diff --git a/src/rt/rust_task.cpp b/src/rt/rust_task.cpp
index 87492600524..c960c9a7250 100644
--- a/src/rt/rust_task.cpp
+++ b/src/rt/rust_task.cpp
@@ -15,7 +15,7 @@
 // FIXME (issue #151): This should be 0x300; the change here is for
 // practicality's sake until stack growth is working.
 
-static size_t const min_stk_bytes = 0x100000;
+static size_t const min_stk_bytes = 0x200000;
 
 // Task stack segments. Heap allocated and chained together.