diff --git a/panda/src/bullet/bullet_includes.h b/panda/src/bullet/bullet_includes.h
index 5ea9af67f1..2bd5f0445b 100644
--- a/panda/src/bullet/bullet_includes.h
+++ b/panda/src/bullet/bullet_includes.h
@@ -17,6 +17,10 @@
 
 #include "pandabase.h"
 
+#ifdef STDFLOAT_DOUBLE
+#define BT_USE_DOUBLE_PRECISION 1
+#endif
+
 #include "btBulletDynamicsCommon.h"
 
 #ifndef CPPPARSER