diff --git a/right/src/link/MK22FN512xxx12_flash.ld b/right/src/link/MK22FN512xxx12_flash.ld
index dd1e065..7c724c9 100644
--- a/right/src/link/MK22FN512xxx12_flash.ld
+++ b/right/src/link/MK22FN512xxx12_flash.ld
@@ -236,6 +236,7 @@ SECTIONS
     . = ALIGN(8);
     __end__ = .;
     PROVIDE(end = .);
+    _pvHeapStart = .; /* Add for _sbrk */
     __HeapBase = .;
     . += HEAP_SIZE;
     __HeapLimit = .;