1 files changed, 3 insertions, 0 deletions
diff --git a/configh.in b/configh.in
index 68ea91aa..1c362292 100644
--- a/configh.in
+++ b/configh.in
@@ -84,6 +84,9 @@
 /* Define to 1 if you have the `isascii' function. */
 #undef HAVE_ISASCII
 
+/* Define to 1 if you have the `isblank' function. */
+#undef HAVE_ISBLANK
+
 /* Define to 1 if you have the `iswctype' function. */
 #undef HAVE_ISWCTYPE