diff --git a/src/xheader.c b/src/xheader.c
index 2cfa6833..f26cf667 100644
--- a/src/xheader.c
+++ b/src/xheader.c
@@ -21,6 +21,7 @@
 #include <fnmatch.h>
 #include <hash.h>
 #include <quotearg.h>
+#include <stpcpy.h>
 #include <xstrtol.h>
 
 #include "common.h"