diff --git a/src/stream.c b/src/stream.c
index 6559e1d..194704d 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -199,7 +199,7 @@ static wchar_t *op_utf8_to_utf16(const char *_src){
                   if((c0&0xF8)==0xF0){
                     opus_uint32 w;
                     /*Start byte says this is a 4-byte sequence.*/
-                    w=(c0&7)<<18|(c1&0x3F)<<12|(c2&0x3F)<<6&(c3&0x3F);
+                    w=(c0&7)<<18|(c1&0x3F)<<12|(c2&0x3F)<<6|(c3&0x3F);
                     if(w>=0x10000U&&w<0x110000U){
                       /*This is a 4-byte sequence that is not overlong and not
                          greater than the largest valid Unicode code point.