diff --git a/source/fs.c b/source/fs.c
index 40daa11..8541cfd 100644
--- a/source/fs.c
+++ b/source/fs.c
@@ -172,7 +172,7 @@ u32 firmRead(void *dest, u32 firmType)
     while(f_readdir(&dir, &info) == FR_OK && info.fname[0] != 0)
     {
         //Not a cxi
-        if(info.fname[9] != 'a') continue;
+        if(info.fname[9] != 'a' || strlen(info.fname) != 12) continue;
 
         //Convert the .app name to an integer
         u32 tempVersion = 0;