diff --git a/src/flac/file.c b/src/flac/file.c
index 77df50b6..0a9f3bde 100644
--- a/src/flac/file.c
+++ b/src/flac/file.c
@@ -26,7 +26,8 @@
 #include <unistd.h> /* for chown() */
 #endif
 #ifdef __CYGWIN__
-#include <io.h> /* for _setmode(), O_BINARY */
+#include <io.h> /* for setmode(), O_BINARY */
+#include <fcntl.h> /* for _O_BINARY */
 #endif
 #include <sys/stat.h> /* for stat(), maybe chmod() */
 #include <string.h> /* for strrchr() */
diff --git a/src/libFLAC/file_decoder.c b/src/libFLAC/file_decoder.c
index 574956cb..e80dec44 100644
--- a/src/libFLAC/file_decoder.c
+++ b/src/libFLAC/file_decoder.c
@@ -25,7 +25,8 @@
 #include <io.h> /* for _setmode() */
 #include <fcntl.h> /* for _O_BINARY */
 #elif defined __CYGWIN__
-#include <io.h> /* for _setmode(), O_BINARY */
+#include <io.h> /* for setmode(), O_BINARY */
+#include <fcntl.h> /* for _O_BINARY */
 #endif
 #include "FLAC/assert.h"
 #include "protected/file_decoder.h"
diff --git a/src/libOggFLAC/file_decoder.c b/src/libOggFLAC/file_decoder.c
index 0c5c71c1..8995783a 100644
--- a/src/libOggFLAC/file_decoder.c
+++ b/src/libOggFLAC/file_decoder.c
@@ -25,7 +25,8 @@
 #include <io.h> /* for _setmode() */
 #include <fcntl.h> /* for _O_BINARY */
 #elif defined __CYGWIN__
-#include <io.h> /* for _setmode(), O_BINARY */
+#include <io.h> /* for setmode(), O_BINARY */
+#include <fcntl.h> /* for _O_BINARY */
 #endif
 #include "FLAC/assert.h"
 #include "protected/file_decoder.h"