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-rw-r--r--sternenblog/cgiutil.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/sternenblog/cgiutil.h b/sternenblog/cgiutil.h
index f809b25..fc359e7 100644
--- a/sternenblog/cgiutil.h
+++ b/sternenblog/cgiutil.h
@@ -3,6 +3,9 @@
  * @brief Simple CGI/HTTP helper functions used by sternenblog.
  */
 
+#ifndef STERNENBLOG_CGIUTIL_H
+#define STERNENBLOG_CGIUTIL_H
+
 #include <stdbool.h>
 
 /*!
@@ -109,3 +112,5 @@ int urlencode_realloc(char **input, int size);
  * @return Pointer to dynamically allocated char buffer containing the URL.
  */
 char *server_url(bool https);
+
+#endif