diff --git a/README.md b/README.md
index 86ef904..392783b 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,7 @@ Blah.
 ```cpp
 // server_demo.cpp
 
-#include <unistd.h>					// sleep(), usleep().
+#include <unistd.h>                 // sleep(), usleep().
 #include <ctime>                    // time().
 #include <iostream>                 // std::cout, std::endl.
 #include <string>                   // std::string.
@@ -164,7 +164,7 @@ int main (void) {
 ```cpp
 // client_demo.cpp
 
-#include <unistd.h>					// sleep(), usleep().
+#include <unistd.h>                 // sleep(), usleep().
 #include <ctime>                    // time().
 #include <iostream>                 // std::cout, std::endl.
 #include <string>                   // std::string.