diff --git a/src/Game/HorseRace.c b/src/Game/HorseRace.c
index dd0a512a..5c6e8ed2 100644
--- a/src/Game/HorseRace.c
+++ b/src/Game/HorseRace.c
@@ -50,7 +50,6 @@
 #include "utility.h"
 
 #ifdef _WIN32
-    #define WIN32_LEAN_AND_MEAN
     #define strcasecmp _stricmp
     #include <direct.h>
     #include <io.h>
diff --git a/src/Game/TitanNet.c b/src/Game/TitanNet.c
index 0222e07f..8feceb76 100644
--- a/src/Game/TitanNet.c
+++ b/src/Game/TitanNet.c
@@ -27,7 +27,6 @@
 #include "utility.h"
 
 #ifdef _WIN32
-    #define WIN32_LEAN_AND_MEAN
     #include <windows.h>
     #include <winbase.h>
     #include <io.h>
diff --git a/src/SDL/main.c b/src/SDL/main.c
index 680c3a16..25b46571 100644
--- a/src/SDL/main.c
+++ b/src/SDL/main.c
@@ -61,7 +61,6 @@
 #include "Universe.h"
 
 #ifdef _WIN32
-    #define WIN32_LEAN_AND_MEAN
     #define strcasecmp _stricmp
     #include <windows.h>
     #include <winreg.h>
diff --git a/src/SDL/render.c b/src/SDL/render.c
index 07eca9a4..eeda018d 100644
--- a/src/SDL/render.c
+++ b/src/SDL/render.c
@@ -83,7 +83,6 @@
 #endif
 
 #ifdef _WIN32
-    #define WIN32_LEAN_AND_MEAN
     #include <windows.h>
 #else
     #include <sys/mman.h>
diff --git a/src/SDL/utility.c b/src/SDL/utility.c
index b3c1de7c..6fa6ae3a 100644
--- a/src/SDL/utility.c
+++ b/src/SDL/utility.c
@@ -112,7 +112,6 @@
 #endif
 
 #ifdef _WIN32
-    #define WIN32_LEAN_AND_MEAN
     #include <windows.h>
     #include <winreg.h>
     #include <shellapi.h>