diff --git a/libs/libc/unistd/lib_getoptargp.c b/libs/libc/unistd/lib_getoptargp.c
index 000bff36c073f..02ff2a7c3da12 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 6feab79175d7d..9d6f5311b75ce 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 2a59ac37d4472..596208e4b2272 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 9a112ee1b4001..fb529330d0db2 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"
 
 /****************************************************************************