diff --git a/crates/runtime/src/traphandlers/unix.rs b/crates/runtime/src/traphandlers/unix.rs
index ef40b8c2c3..445646e6a5 100644
--- a/crates/runtime/src/traphandlers/unix.rs
+++ b/crates/runtime/src/traphandlers/unix.rs
@@ -286,7 +286,14 @@ pub fn lazy_per_thread_init() {
 
     /// The size of the sigaltstack (not including the guard, which will be
     /// added). Make this large enough to run our signal handlers.
-    const MIN_STACK_SIZE: usize = 16 * 4096;
+    ///
+    /// The main current requirement of the signal handler in terms of stack
+    /// space is that `malloc`/`realloc` are called to create a `Backtrace` of
+    /// wasm frames.
+    ///
+    /// Historically this was 16k. Turns out jemalloc requires more than 16k of
+    /// stack space in debug mode, so this was bumped to 64k.
+    const MIN_STACK_SIZE: usize = 64 * 4096;
 
     struct Stack {
         mmap_ptr: *mut libc::c_void,