1 files changed, 1 insertions, 0 deletions
diff --git a/regex.c b/regex.c
index 58ef7f5d3c..e23d33eb11 100644
--- a/regex.c
+++ b/regex.c
@@ -25,6 +25,7 @@
    On the other hand, if you compile with both -Dtest and -Dcanned you
    can run some tests we've already thought of.  */
 
+#include "config.h"
 
 /* We write fatal error messages on standard error.  */
 #include <stdio.h>