diff --git a/include/mocha/mocha.h b/include/mocha/mocha.h
index 99f8ba9..f70423f 100644
--- a/include/mocha/mocha.h
+++ b/include/mocha/mocha.h
@@ -12,6 +12,7 @@ typedef enum MochaUtilsStatus {
     MOCHA_RESULT_SUCCESS                 = 0,
     MOCHA_RESULT_INVALID_ARGUMENT        = -0x01,
     MOCHA_RESULT_MAX_CLIENT              = -0x02,
+    MOCHA_RESULT_NOT_FOUND               = -0x06,
     MOCHA_RESULT_UNSUPPORTED_API_VERSION = -0x10,
     MOCHA_RESULT_UNSUPPORTED_COMMAND     = -0x11,
     MOCHA_RESULT_LIB_UNINITIALIZED       = -0x20,
@@ -90,6 +91,17 @@ typedef struct WUDDiscKey {
     uint8_t key[0x10];
 } WUDDiscKey;
 
+/**
+ * Reads the disc key (used to decrypt the SI partition) of the inserted disc.
+ *
+ * @param discKey target buffer where the result will be stored.
+ * @return MOCHA_RESULT_SUCCESS: The disc key of the inserted disc has been read into the given buffer.<br>
+ *         MOCHA_RESULT_INVALID_ARGUMENT: The given discKey buffer was NULL <br>
+ *         MOCHA_RESULT_LIB_UNINITIALIZED: Library was not initialized. Call Mocha_InitLibrary() before using this function.<br>
+ *         MOCHA_RESULT_UNSUPPORTED_COMMAND: Command not supported by the currently loaded mocha version.<br>
+ *         MOCHA_RESULT_NOT_FOUND: Failed to obtain disc key, no disc inserted?.
+ *         MOCHA_RESULT_UNKNOWN_ERROR: Unknown error.
+ */
 MochaUtilsStatus Mocha_ODMGetDiscKey(WUDDiscKey *discKey);
 
 MochaUtilsStatus Mocha_SEEPROMRead(uint8_t *out_buffer, uint32_t offset, uint32_t size);
diff --git a/source/utils.cpp b/source/utils.cpp
index 906b62b..fe23eaa 100644
--- a/source/utils.cpp
+++ b/source/utils.cpp
@@ -170,11 +170,13 @@ MochaUtilsStatus Mocha_ODMGetDiscKey(WUDDiscKey *discKey) {
     if (odm_handle >= 0) {
         ALIGN_0x40 uint32_t io_buffer[0x40 / 4];
         // disc encryption key, only works with patched IOSU
-        io_buffer[0] = 3;
-
-        if (IOS_Ioctl(odm_handle, 0x06, io_buffer, 0x14, io_buffer, 0x20) == IOS_ERROR_OK) {
+        io_buffer[0]         = 3;
+        IOSError ioctlResult = IOS_Ioctl(odm_handle, 0x06, io_buffer, 0x14, io_buffer, 0x20);
+        if (ioctlResult == IOS_ERROR_OK) {
             memcpy(discKey, io_buffer, 16);
             res = MOCHA_RESULT_SUCCESS;
+        } else if (ioctlResult == (IOSError) 0xFFF1EFFF) {
+            res = MOCHA_RESULT_NOT_FOUND;
         }
         IOS_Close(odm_handle);
     }