diff --git a/src/context.c b/src/context.c
index 63824a5..c7642e6 100644
--- a/src/context.c
+++ b/src/context.c
@@ -29,6 +29,7 @@
 #include <string.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #include <windows.h>
 #endif
diff --git a/src/serial_win32.c b/src/serial_win32.c
index 8427a25..2b009f0 100644
--- a/src/serial_win32.c
+++ b/src/serial_win32.c
@@ -21,6 +21,7 @@
 
 #include <stdlib.h>
 
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #include <windows.h>
 
diff --git a/src/socket.h b/src/socket.h
index e2efa14..bc37095 100644
--- a/src/socket.h
+++ b/src/socket.h
@@ -23,6 +23,7 @@
 #define DC_SOCKET_H
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #include <winsock2.h>
 #include <windows.h>
diff --git a/src/timer.c b/src/timer.c
index 14ccd46..cc17f23 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -26,6 +26,7 @@
 #include <stdlib.h>
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #include <windows.h>
 #else
diff --git a/src/usb.c b/src/usb.c
index e39bc48..758c604 100644
--- a/src/usb.c
+++ b/src/usb.c
@@ -28,6 +28,7 @@
 
 #ifdef HAVE_LIBUSB
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #endif
 #include <libusb.h>
diff --git a/src/usbhid.c b/src/usbhid.c
index 22981b7..9231e64 100644
--- a/src/usbhid.c
+++ b/src/usbhid.c
@@ -29,6 +29,7 @@
 #include <pthread.h>
 #endif
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #include <windows.h>
 #endif
@@ -43,6 +44,7 @@
 
 #if defined(USE_LIBUSB)
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #define NOGDI
 #endif
 #include <libusb.h>