diff --git a/mp/src/public/iclient.h b/mp/src/public/iclient.h
index 230c105d5..9901e288a 100644
--- a/mp/src/public/iclient.h
+++ b/mp/src/public/iclient.h
@@ -12,6 +12,7 @@
 
 #include <inetmsghandler.h>
 #include "tier0/platform.h"
+#include "userid.h"
 
 class IServer;
 class INetMessage;
diff --git a/mp/src/public/mathlib/mathlib.h b/mp/src/public/mathlib/mathlib.h
index c531c4a15..83fdb6a0d 100644
--- a/mp/src/public/mathlib/mathlib.h
+++ b/mp/src/public/mathlib/mathlib.h
@@ -453,7 +453,7 @@ void inline SinCos( float radians, float *sine, float *cosine )
 	*sine = sin( radians );
 	*cosine = cos( radians );
 #elif defined( POSIX )
-	double __cosr, __sinr;
+	register double __cosr, __sinr;
 	__asm ("fsincos" : "=t" (__cosr), "=u" (__sinr) : "0" (radians));
 
   	*sine = __sinr;