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-rw-r--r--libguile/vm-engine.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/libguile/vm-engine.h b/libguile/vm-engine.h
index 178828cea..0ebb51b0d 100644
--- a/libguile/vm-engine.h
+++ b/libguile/vm-engine.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001, 2009-2012, 2014 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2009-2012, 2014, 2015 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -284,7 +284,7 @@
do { if (SCM_UNLIKELY (sp >= stack_limit)) goto handle_overflow; } while (0)
-#ifdef VM_CHECK_UNDERFLOW
+#if VM_CHECK_UNDERFLOW
#define PRE_CHECK_UNDERFLOW(N) \
VM_ASSERT (sp - (N) > SCM_FRAME_UPPER_ADDRESS (fp), vm_error_stack_underflow ())
#define CHECK_UNDERFLOW() PRE_CHECK_UNDERFLOW (0)