diff --git a/include/xbps_api.h b/include/xbps_api.h
index fe86376c..0eef5fde 100644
--- a/include/xbps_api.h
+++ b/include/xbps_api.h
@@ -28,6 +28,7 @@
 
 #include <stdio.h>
 #include <inttypes.h>
+#include <sys/cdefs.h>
 #include <sys/queue.h>
 #define NDEBUG
 #include <assert.h>
@@ -74,6 +75,8 @@
 #define SYMEXPORT
 #endif
 
+__BEGIN_DECLS
+
 /* From lib/configure.c */
 int SYMEXPORT	xbps_configure_pkg(const char *, const char *, bool);
 int SYMEXPORT	xbps_configure_all_pkgs(void);
@@ -226,4 +229,6 @@ int SYMEXPORT		xbps_get_flags(void);
 bool SYMEXPORT		xbps_yesno(const char *, ...);
 bool SYMEXPORT		xbps_noyes(const char *, ...);
 
+__END_DECLS
+
 #endif /* !_XBPS_API_H_ */