diff --git a/artiq/firmware/runtime/runtime.ld b/artiq/firmware/runtime/runtime.ld
index 57d76ee45..b1a7ad7e3 100644
--- a/artiq/firmware/runtime/runtime.ld
+++ b/artiq/firmware/runtime/runtime.ld
@@ -71,7 +71,7 @@ SECTIONS
 
     .stack (NOLOAD) : ALIGN(16)
     {
-        . += 0x4000;
+        . += 0x10000;
         _fstack = . - 16;
     } > runtime