diff --git a/testsuites/sptests/spfatal06/testcase.h b/testsuites/sptests/spfatal06/testcase.h
index 36d3173def..abfa66ddfc 100644
--- a/testsuites/sptests/spfatal06/testcase.h
+++ b/testsuites/sptests/spfatal06/testcase.h
@@ -42,6 +42,7 @@ void *New_stack_allocate_hook(size_t unused);
 
 void *New_stack_allocate_hook(size_t unused)
 {
+  return NULL;
 }
 
 void force_error()