diff --git a/source/main.c b/source/main.c
index 376404b..1dbf6a5 100644
--- a/source/main.c
+++ b/source/main.c
@@ -70,12 +70,13 @@ void main(int argc, char **argv, u32 magicWord)
 
         isFirmlaunch = true;
     }
-    else
+    else if(magicWord == 0xB002)
     {
         static const char argv[] = "firm0:";
         for(u32 i = 0; i < sizeof(argv); i++) //Copy and convert the path to UTF-16
             launchedPath[i] = argv[i];
     }
+    else error("Launched using an unsupported loader.");
 
     if(memcmp(launchedPath, u"sdmc", 8) == 0)
     {
diff --git a/source/start.s b/source/start.s
index 2e1be5b..86a886f 100644
--- a/source/start.s
+++ b/source/start.s
@@ -43,7 +43,7 @@ _start:
     mrceq p15, 0, r5, c6, c7, 0
     ldreq r4, =0x1FFFE019
     cmpeq r4, r5
-    ldreq r2, =0xCAFE
+    ldreq r2, =0xB002
 
     mov r9, r0
     mov r10, r1