diff --git a/Draw.c b/Draw.c
index eb8666d..5b60a87 100644
--- a/Draw.c
+++ b/Draw.c
@@ -15,6 +15,7 @@
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
+#include "3dfx.h"
 #include "cvgregs.h"
 #include "glide.h"
 #include "sst1init.h"