diff --git a/lib/roken/roken.h b/lib/roken/roken.h
index 733fcfcbd..89eba01cb 100644
--- a/lib/roken/roken.h
+++ b/lib/roken/roken.h
@@ -49,7 +49,7 @@ char *strerror(int eno);
 char *hstrerror(int herr);
 #endif
 
-#ifndef HAVE_H_ERRNO
+#ifdef NEED_H_ERRNO_DECLARATION
 extern int h_errno;
 #endif
 
diff --git a/lib/roken/roken.h.in b/lib/roken/roken.h.in
index 733fcfcbd..89eba01cb 100644
--- a/lib/roken/roken.h.in
+++ b/lib/roken/roken.h.in
@@ -49,7 +49,7 @@ char *strerror(int eno);
 char *hstrerror(int herr);
 #endif
 
-#ifndef HAVE_H_ERRNO
+#ifdef NEED_H_ERRNO_DECLARATION
 extern int h_errno;
 #endif