diff --git a/src/libsodium/core.c b/src/libsodium/core.c
index aa6ca2b6..99476b6d 100644
--- a/src/libsodium/core.c
+++ b/src/libsodium/core.c
@@ -2,7 +2,7 @@
 #include "sodium.h"
 
 int
-sodium_init(const struct sodium_options *options)
+sodium_init(sodium_options *options)
 {
     (void) options;
 
diff --git a/src/libsodium/include/sodium/core.h b/src/libsodium/include/sodium/core.h
index 0e649e62..a7e53004 100644
--- a/src/libsodium/include/sodium/core.h
+++ b/src/libsodium/include/sodium/core.h
@@ -2,7 +2,9 @@
 #ifndef __SODIUM_CORE_H__
 #define __SODIUM_CORE_H__
 
-int  sodium_init(const struct sodium_options *options);
+typedef struct sodium_options sodium_options;
+
+int  sodium_init(const sodium_options *options);
 int  sodium_reinit(void);
 void sodium_shutdown(void);