diff --git a/doc/html/changelog.html b/doc/html/changelog.html
index dd37e74f..a2a57b6e 100644
--- a/doc/html/changelog.html
+++ b/doc/html/changelog.html
@@ -105,6 +105,7 @@
Fixed bug where sometimes an existing installation of flac could interfere with the build process (SF #1763690).
Some MinGW fixes (SF #1684879).
Solaris 10 fixes (SF #1783225).
+ OS/2 fixes (SF #1771378).
diff --git a/src/libFLAC/stream_decoder.c b/src/libFLAC/stream_decoder.c
index 86eaacfa..505958f1 100644
--- a/src/libFLAC/stream_decoder.c
+++ b/src/libFLAC/stream_decoder.c
@@ -1287,9 +1287,11 @@ FILE *get_binary_stdin_(void)
*/
#if defined _MSC_VER || defined __MINGW32__
_setmode(_fileno(stdin), _O_BINARY);
-#elif defined __CYGWIN__ || defined __EMX__
+#elif defined __CYGWIN__
/* almost certainly not needed for any modern Cygwin, but let's be safe... */
setmode(_fileno(stdin), _O_BINARY);
+#elif defined __EMX__
+ setmode(fileno(stdin), O_BINARY);
#endif
return stdin;