diff --git a/libguile/objects.c b/libguile/objects.c
index 5628638a4..fea28193d 100644
--- a/libguile/objects.c
+++ b/libguile/objects.c
@@ -120,7 +120,7 @@ SCM_DEFINE (scm_class_of, "class-of", 1, 0, 0,
 	  return scm_class_symbol;
 	case scm_tc7_vector:
 	case scm_tc7_wvect:
-#ifdef SCM_HAVE_ARRAYS
+#if SCM_HAVE_ARRAYS
 	case scm_tc7_bvect:
 	case scm_tc7_byvect:
 	case scm_tc7_svect: