diff --git a/libs/libc/unistd/lib_getoptargp.c b/libs/libc/unistd/lib_getoptargp.c
index 000bff36c0..02ff2a7c3d 100644
--- a/libs/libc/unistd/lib_getoptargp.c
+++ b/libs/libc/unistd/lib_getoptargp.c
@@ -26,8 +26,6 @@
 
 #include <nuttx/config.h>
 
-#include <unistd.h>
-
 #include "unistd.h"
 
 /****************************************************************************
diff --git a/libs/libc/unistd/lib_getopterrp.c b/libs/libc/unistd/lib_getopterrp.c
index 6feab79175..9d6f5311b7 100644
--- a/libs/libc/unistd/lib_getopterrp.c
+++ b/libs/libc/unistd/lib_getopterrp.c
@@ -26,8 +26,6 @@
 
 #include <nuttx/config.h>
 
-#include <unistd.h>
-
 #include "unistd.h"
 
 /****************************************************************************
diff --git a/libs/libc/unistd/lib_getoptindp.c b/libs/libc/unistd/lib_getoptindp.c
index 2a59ac37d4..596208e4b2 100644
--- a/libs/libc/unistd/lib_getoptindp.c
+++ b/libs/libc/unistd/lib_getoptindp.c
@@ -26,8 +26,6 @@
 
 #include <nuttx/config.h>
 
-#include <unistd.h>
-
 #include "unistd.h"
 
 /****************************************************************************
diff --git a/libs/libc/unistd/lib_getoptoptp.c b/libs/libc/unistd/lib_getoptoptp.c
index 9a112ee1b4..fb529330d0 100644
--- a/libs/libc/unistd/lib_getoptoptp.c
+++ b/libs/libc/unistd/lib_getoptoptp.c
@@ -26,8 +26,6 @@
 
 #include <nuttx/config.h>
 
-#include <unistd.h>
-
 #include "unistd.h"
 
 /****************************************************************************