diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 76e52ba8396b9bd8e4f701479b70f9561c181eb8..c774568478f8ff5d9a5175d412724b3ca01763fd 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1311,6 +1311,8 @@ typedef struct AVCodecContext {
 #define FF_MM_SSE      0x0008 /* SSE functions */
 #define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
+#define FF_MM_SSE3     0x0040 /* Prescott SSE3 functions */
+#define FF_MM_SSSE3    0x0080 /* Conroe SSSE3 functions */
 #define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
 
     /**