1 files changed, 3 insertions, 0 deletions
diff --git a/Alc/threads.c b/Alc/threads.c
index 1f7e3a6c..1c422949 100644
--- a/Alc/threads.c
+++ b/Alc/threads.c
@@ -32,6 +32,9 @@
 
 #ifdef _WIN32
 
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
 typedef struct althread_info {
     ALuint (*func)(ALvoid*);
     ALvoid *ptr;