diff --git a/libguile/evalext.c b/libguile/evalext.c
index 4ef812ffd..3c6d96d5e 100644
--- a/libguile/evalext.c
+++ b/libguile/evalext.c
@@ -166,7 +166,7 @@ SCM_DEFINE (scm_self_evaluating_p, "self-evaluating?", 1, 0, 0,
 	case scm_tcs_closures:
 	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: