diff --git a/open/open_append.c b/open/open_append.c
index 0250993..d90fadd 100644
--- a/open/open_append.c
+++ b/open/open_append.c
@@ -1,5 +1,5 @@
 #include <unistd.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
 #include "open.h"
 
 extern int open_append(const char *filename) {
diff --git a/open/open_excl.c b/open/open_excl.c
index 27a0abb..ed44640 100644
--- a/open/open_excl.c
+++ b/open/open_excl.c
@@ -1,5 +1,5 @@
 #include <unistd.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
 #include "open.h"
 
 extern int open_excl(const char *filename) {
diff --git a/open/open_read.c b/open/open_read.c
index ba6c647..c0e99f2 100644
--- a/open/open_read.c
+++ b/open/open_read.c
@@ -1,5 +1,5 @@
 #include <unistd.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
 #include "open.h"
 
 extern int open_read(const char *filename) {
diff --git a/open/open_trunc.c b/open/open_trunc.c
index 0919025..8f0acf8 100644
--- a/open/open_trunc.c
+++ b/open/open_trunc.c
@@ -1,5 +1,5 @@
 #include <unistd.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
 #include "open.h"
 
 extern int open_trunc(const char *filename) {
diff --git a/open/open_write.c b/open/open_write.c
index 4027d06..037a52d 100644
--- a/open/open_write.c
+++ b/open/open_write.c
@@ -1,5 +1,5 @@
 #include <unistd.h>
-#include <sys/fcntl.h>
+#include <fcntl.h>
 #include "open.h"
 
 extern int open_write(const char *filename) {