diff --git a/src/libsodium/include/sodium/utils.h b/src/libsodium/include/sodium/utils.h
index bd34649a..817919ba 100644
--- a/src/libsodium/include/sodium/utils.h
+++ b/src/libsodium/include/sodium/utils.h
@@ -36,10 +36,10 @@ int sodium_hex2bin(unsigned char * const bin, const size_t bin_maxlen,
                    const char ** const hex_end);
 
 SODIUM_EXPORT
-int sodium_mlock(const void *addr, const size_t len);
+int sodium_mlock(void * const addr, const size_t len);
 
 SODIUM_EXPORT
-int sodium_munlock(const void *addr, const size_t len);
+int sodium_munlock(void * const addr, const size_t len);
 
 #ifdef __cplusplus
 }
diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index fdf16390..115ea9a7 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -158,7 +158,7 @@ sodium_hex2bin(unsigned char * const bin, const size_t bin_maxlen,
 }
 
 int
-sodium_mlock(const void *addr, const size_t len)
+sodium_mlock(void * const addr, const size_t len)
 {
 #ifdef HAVE_MLOCK
     return mlock(addr, len);
@@ -171,7 +171,7 @@ sodium_mlock(const void *addr, const size_t len)
 }
 
 int
-sodium_munlock(const void *addr, const size_t len)
+sodium_munlock(void * const addr, const size_t len)
 {
 #ifdef HAVE_MLOCK
     return munlock(addr, len);