diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index ccf3e45fe2..15a2c07438 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -587,6 +587,7 @@ static void compute_exp_strategy_ch(AC3EncodeContext *s, uint8_t *exp_strategy,
         else
             exp_strategy[blk] = EXP_REUSE;
     }
+    emms_c();
 
     /* now select the encoding strategy type : if exponents are often
        recoded, we use a coarse encoding */