diff --git a/reactos/include/psdk/ks.h b/reactos/include/psdk/ks.h
index 0563313c039..13f5b579de5 100644
--- a/reactos/include/psdk/ks.h
+++ b/reactos/include/psdk/ks.h
@@ -288,8 +288,6 @@ typedef struct
 #define KSINTERFACE_STANDARD_CONTROL
 #endif
 
-typedef KSIDENTIFIER KSPIN_INTERFACE, *PKSPIN_INTERFACE;
-
 #define STATIC_KSINTERFACESETID_Standard \
     0x1A8766A0L, 0x62CE, 0x11CF, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00
 DEFINE_GUIDSTRUCT("1A8766A0-62CE-11CF-A5D6-28DB04C10000", KSINTERFACESETID_Standard);