diff --git a/vp4d.c b/vp4d.c
index d935f54..626f16a 100644
--- a/vp4d.c
+++ b/vp4d.c
@@ -95,7 +95,7 @@ extern char _shuffle_16[256][16];
 #include "vp4d.c"
 
 #undef  BITUNDD
-  #elif defined(PLAIN)
+  #elif !defined(SSE2_ON) && !defined(AVX2_ON) 
 
 #define _P4DEC      _p4dec
 #define  P4DEC       p4dec
@@ -531,4 +531,4 @@ unsigned char *TEMPLATE2(p4fdecx, USIZE)(unsigned char *in, unsigned n, uint_t *
   return in + PAD8(n*b);
 }
     #endif
-#endif
\ No newline at end of file
+#endif