diff --git a/nx/include/switch/services/set.h b/nx/include/switch/services/set.h
index 5dae946b..609957be 100644
--- a/nx/include/switch/services/set.h
+++ b/nx/include/switch/services/set.h
@@ -186,4 +186,4 @@ Result setsysGetDeviceNickname(char* buffer);
  * @brief Sets the system's nickname.
  * @param buffer Pointer to read the nickname from. (The buffer size needs to be at least 0x80 bytes)
  */
-Result setsysSetDeviceNickname(char* buffer);
+Result setsysSetDeviceNickname(const char* buffer);
diff --git a/nx/source/services/set.c b/nx/source/services/set.c
index f1423240..737dcc04 100644
--- a/nx/source/services/set.c
+++ b/nx/source/services/set.c
@@ -720,7 +720,7 @@ Result setsysGetDeviceNickname(char* buffer) {
     return rc;
 }
 
-Result setsysSetDeviceNickname(char* buffer) {
+Result setsysSetDeviceNickname(const char* buffer) {
     IpcCommand c;
     ipcInitialize(&c);