diff --git a/ports/stm8/tests-main.c b/ports/stm8/tests-main.c
index bf83ee6..460c4bc 100644
--- a/ports/stm8/tests-main.c
+++ b/ports/stm8/tests-main.c
@@ -95,10 +95,6 @@
  */
 
 
-/* Linker-provided startup stack location (usually top of RAM) */
-extern int _stack;
-
-
 /* Local data */
 
 /* Application threads' TCBs */