diff --git a/src/lisp/NetBSD-os.c b/src/lisp/NetBSD-os.c
index 6957ab1a670ecc4391f53e190d1c298bb7617e57..5c5a8bf5101567ef75e9490b1432cf53750c366c 100644
--- a/src/lisp/NetBSD-os.c
+++ b/src/lisp/NetBSD-os.c
@@ -277,8 +277,8 @@ valid_addr(os_vm_address_t addr)
 #ifndef GENCGC
 	|| in_range_p(addr, DYNAMIC_1_SPACE_START, dynamic_space_size)
 #endif
-	|| in_range_p(addr, CONTROL_STACK_START, control_stack_size)
-	|| in_range_p(addr, BINDING_STACK_START, binding_stack_size))
+	|| in_range_p(addr, control_stack, control_stack_size)
+	|| in_range_p(addr, binding_stack, binding_stack_size))
 	return TRUE;
     return FALSE;
 }