diff --git a/examples/gz.l b/examples/gz.l
index e94b2a267..177db79b3 100644
--- a/examples/gz.l
+++ b/examples/gz.l
@@ -9,6 +9,7 @@
 #include <cstdio>
 #include <streambuf>
 #include <cstring>
+#include <unistd.h>
 #include <zlib.h>
 
 #ifndef Z_BUF_LEN
diff --git a/examples/lua.hpp b/examples/lua.hpp
index ad88580ee..8e8832369 100644
--- a/examples/lua.hpp
+++ b/examples/lua.hpp
@@ -7,6 +7,8 @@
 #include <cstdlib>
 #include <cstdio>
 #include <cstdint>
+#include <cstring>
+#include <memory>
 #include <string>
 #include <set>
 #include <stack>
diff --git a/examples/minic.hpp b/examples/minic.hpp
index 2e92b0495..49f886a52 100644
--- a/examples/minic.hpp
+++ b/examples/minic.hpp
@@ -9,6 +9,7 @@
 #include <cstdlib>
 #include <cstdio>
 #include <cstdint>
+#include <cstring>
 #include <string>
 #include <map>
 #include <set>