diff --git a/lib/std/os/windows/user32.zig b/lib/std/os/windows/user32.zig
index bda1fdffb6..7b82922469 100644
--- a/lib/std/os/windows/user32.zig
+++ b/lib/std/os/windows/user32.zig
@@ -73,7 +73,6 @@ pub const WM_XBUTTONDBLCLK = 0x020D;
 // WA
 pub const WA_INACTIVE = 0;
 pub const WA_ACTIVE = 0x0006;
-pub const WM_ACTIVATE = 0x0006;
 
 // WS
 pub const WS_OVERLAPPED = 0x00000000;