diff --git a/common/mathlib.c b/common/mathlib.c
index e5e92d5..9a6cdba 100644
--- a/common/mathlib.c
+++ b/common/mathlib.c
@@ -23,9 +23,10 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
 #include <math.h>
-#include <qtypes.h>
-#include <quakedef.h>
-#include <mathlib.h>
+#include "qtypes.h"
+#include "quakedef.h"
+#include "mathlib.h"
+#include "model.h"
 
 void Sys_Error (char *error, ...);