diff --git a/build/libraries/fs/ARM9/src/fs_firm.c b/build/libraries/fs/ARM9/src/fs_firm.c
index 399cfc64..467927ab 100644
--- a/build/libraries/fs/ARM9/src/fs_firm.c
+++ b/build/libraries/fs/ARM9/src/fs_firm.c
@@ -172,6 +172,25 @@ BOOL FS_GetTitleBootContentPathFast(char* buf, OSTitleId titleId)
     return TRUE;
 }
 
+/*---------------------------------------------------------------------------*
+  Name:         SEA_Decrypt
+
+  Description:  stub function
+
+  Arguments:
+
+  Returns:
+ *---------------------------------------------------------------------------*/
+AESResult SEA_Decrypt(const void* src, u32 srcSize, void* dst);
+SDK_WEAK_SYMBOL AESResult SEA_Decrypt(const void* src, u32 srcSize, void* dst)
+ __attribute__((never_inline))
+{
+(void)src;
+(void)srcSize;
+(void)dst;
+    return AES_RESULT_SUCCESS;
+}
+
 /*---------------------------------------------------------------------------*
   Name:         FS_ResolveSrl