diff --git a/panda/src/tinydisplay/zmath.h b/panda/src/tinydisplay/zmath.h
index 5296a8ad06..73fae86d6c 100644
--- a/panda/src/tinydisplay/zmath.h
+++ b/panda/src/tinydisplay/zmath.h
@@ -1,6 +1,8 @@
 #ifndef __ZMATH__
 #define __ZMATH__
 
+#include "numeric_types.h"
+
 /* Matrix & Vertex */
 
 typedef struct {