diff --git a/template/verconf.h.tmpl b/template/verconf.h.tmpl
index 9325aee0ff..3b8a8aad76 100644
--- a/template/verconf.h.tmpl
+++ b/template/verconf.h.tmpl
@@ -21,13 +21,13 @@
 #define RUBY_SITEARCH_PREFIX_FOR(arch)	"${rubysitearchprefix}"
 #define RUBY_LIB			"${rubylibdir}"
 #define RUBY_ARCH_LIB_FOR(arch) 	"${rubyarchdir}"
-% if C["sitedir"] == "no"
+% if !C["sitedir"] || C["sitedir"] == "no"
 #define NO_RUBY_SITE_LIB		1
 % else
 #define RUBY_SITE_LIB			"${sitedir}"
 #define RUBY_SITE_ARCH_LIB_FOR(arch)	"${sitearchdir}"
 % end
-% if C["vendordir"] == "no"
+% if !C["vendordir"] || C["vendordir"] == "no"
 #define NO_RUBY_VENDOR_LIB		1
 % else
 #define RUBY_VENDOR_LIB 		"${vendordir}"