diff --git a/src/libsodium/core.c b/src/libsodium/core.c
index 99476b6d..020c042b 100644
--- a/src/libsodium/core.c
+++ b/src/libsodium/core.c
@@ -1,8 +1,8 @@
 
-#include "sodium.h"
+#include "core.h"
 
 int
-sodium_init(sodium_options *options)
+sodium_init(const sodium_options *options)
 {
     (void) options;