diff --git a/fuse_sideload.h b/fuse_sideload.h
index c0b16ef..f9e3bf0 100644
--- a/fuse_sideload.h
+++ b/fuse_sideload.h
@@ -17,6 +17,10 @@
 #ifndef __FUSE_SIDELOAD_H
 #define __FUSE_SIDELOAD_H
 
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
 // define the filenames created by the sideload FUSE filesystem
 #define FUSE_SIDELOAD_HOST_MOUNTPOINT "/sideload"
 #define FUSE_SIDELOAD_HOST_FILENAME "package.zip"
@@ -35,4 +39,6 @@
 int run_fuse_sideload(struct provider_vtab* vtab, void* cookie,
                       uint64_t file_size, uint32_t block_size);
 
+__END_DECLS
+
 #endif