diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index 00ed7fc3f5..e5a1acecb0 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -322,7 +322,7 @@ static av_cold int decode_init(AVCodecContext * avctx)
 
     s->avctx = avctx;
     s->apply_window_mp3 = apply_window_mp3_c;
-#if HAVE_MMX
+#if HAVE_MMX && CONFIG_FLOAT
     ff_mpegaudiodec_init_mmx(s);
 #endif
     if (HAVE_ALTIVEC && CONFIG_FLOAT) ff_mpegaudiodec_init_altivec(s);