diff --git a/configure b/configure
index 23066efa32..021d30855d 100755
--- a/configure
+++ b/configure
@@ -8090,7 +8090,6 @@ cat > $TMPH <<EOF
 #define EXTERN_ASM ${extern_prefix}
 #define BUILDSUF "$build_suffix"
 #define SLIBSUF "$SLIBSUF"
-#define HAVE_MMX2 HAVE_MMXEXT
 #define SWS_MAX_FILTER_SIZE $sws_max_filter_size
 EOF
 
diff --git a/libavutil/version.c b/libavutil/version.c
index b0f4f94a7a..75c5c0d1a8 100644
--- a/libavutil/version.c
+++ b/libavutil/version.c
@@ -43,7 +43,6 @@ unsigned avutil_version(void)
     av_assert0(AVMEDIA_TYPE_ATTACHMENT == 4);
     av_assert0(AV_PICTURE_TYPE_BI == 7);
     av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
-    av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
 
     av_assert0(((size_t)-1) > 0); // C guarantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844