diff --git a/libc/unistd/unlinkat.cpp b/libc/unistd/unlinkat.cpp
index b9289530..03429217 100644
--- a/libc/unistd/unlinkat.cpp
+++ b/libc/unistd/unlinkat.cpp
@@ -24,6 +24,7 @@
 
 #include <sys/syscall.h>
 #include <fcntl.h>
+#include <unistd.h>
 
 DEFN_SYSCALL3(int, sys_unlinkat, SYSCALL_UNLINKAT, int, const char*, int);
 
diff --git a/libc/wchar/wcscpy.cpp b/libc/wchar/wcscpy.cpp
index 2c16a19b..89f9caad 100644
--- a/libc/wchar/wcscpy.cpp
+++ b/libc/wchar/wcscpy.cpp
@@ -22,7 +22,7 @@
 
 *******************************************************************************/
 
-#include <string.h>
+#include <wchar.h>
 
 extern "C" wchar_t* wcscpy(wchar_t* dest, const wchar_t* src)
 {
diff --git a/libc/wchar/wcslen.cpp b/libc/wchar/wcslen.cpp
index 13ad2f4e..737233af 100644
--- a/libc/wchar/wcslen.cpp
+++ b/libc/wchar/wcslen.cpp
@@ -22,7 +22,7 @@
 
 *******************************************************************************/
 
-#include <string.h>
+#include <wchar.h>
 
 extern "C" size_t wcslen(const wchar_t* str)
 {