1 files changed, 1 insertions, 1 deletions
diff --git a/txr.h b/txr.h
index 3da972c1..e4c138b5 100644
--- a/txr.h
+++ b/txr.h
@@ -29,7 +29,7 @@ extern int opt_nobindings;
 extern int opt_lisp_bindings;
 extern int opt_arraydims;
 extern int opt_gc_debug;
-#ifdef HAVE_VALGRIND
+#if HAVE_VALGRIND
 extern int opt_vg_debug;
 #endif
 extern int opt_derivative_regex;