diff --git a/zone/Map.cpp b/zone/Map.cpp
index 95a6ba1a5..3e8240745 100644
--- a/zone/Map.cpp
+++ b/zone/Map.cpp
@@ -31,6 +31,7 @@
 #include "zone.h"
 #ifdef _WINDOWS
 #define snprintf	_snprintf
+#define strlwr		_strlwr
 #endif
 
 extern Zone* zone;
diff --git a/zone/command.cpp b/zone/command.cpp
index da4188f9a..254211453 100644
--- a/zone/command.cpp
+++ b/zone/command.cpp
@@ -39,6 +39,8 @@
 
 #ifdef _WINDOWS
 #define strcasecmp _stricmp
+#define strlwr _strlwr
+#define strupr _strupr
 #endif
 
 #include "../common/debug.h"
diff --git a/zone/entity.cpp b/zone/entity.cpp
index ed5ee33f0..115e4c3e0 100644
--- a/zone/entity.cpp
+++ b/zone/entity.cpp
@@ -25,6 +25,7 @@
 
 #ifdef _WINDOWS
 #include <process.h>
+#define strupr		_strupr
 #else
 #include <pthread.h>
 #include "../common/unix.h"
diff --git a/zone/pathing.cpp b/zone/pathing.cpp
index 404b3d898..e58e2f59b 100644
--- a/zone/pathing.cpp
+++ b/zone/pathing.cpp
@@ -14,6 +14,7 @@
 
 #ifdef _WINDOWS
 #define snprintf _snprintf
+#define strlwr		_strlwr
 #endif
 
 //#define PATHDEBUG
diff --git a/zone/trading.cpp b/zone/trading.cpp
index bc1a248a9..0ce4ff9ee 100644
--- a/zone/trading.cpp
+++ b/zone/trading.cpp
@@ -24,6 +24,10 @@
 #include "worldserver.h"
 extern WorldServer worldserver;
 
+#ifdef _WINDOWS
+#define strupr		_strupr
+#endif
+
 // The maximum amount of a single bazaar/barter transaction expressed in copper.
 // Equivalent to 2 Million plat
 #define MAX_TRANSACTION_VALUE 2000000000
diff --git a/zone/watermap.cpp b/zone/watermap.cpp
index 378433a90..385c887e1 100644
--- a/zone/watermap.cpp
+++ b/zone/watermap.cpp
@@ -27,6 +27,7 @@
 
 #ifdef _WINDOWS
 #define snprintf _snprintf
+#define strlwr		_strlwr
 #endif
 
 
diff --git a/zone/zone.cpp b/zone/zone.cpp
index 487bda58f..3ae8d270f 100644
--- a/zone/zone.cpp
+++ b/zone/zone.cpp
@@ -28,6 +28,7 @@
 #include <process.h>
 #define	snprintf	_snprintf
 #define	vsnprintf	_vsnprintf
+#define strlwr		_strlwr
 #else
 #include <pthread.h>
 #include "../common/unix.h"