diff --git a/panda/src/egg/eggVertexPool.cxx b/panda/src/egg/eggVertexPool.cxx
index 86d8ae51b7..a668b3e421 100644
--- a/panda/src/egg/eggVertexPool.cxx
+++ b/panda/src/egg/eggVertexPool.cxx
@@ -15,6 +15,7 @@
 #include "eggVertexPool.h"
 #include "eggPrimitive.h"
 #include "eggUtilities.h"
+#include <iterator>
 
 #include "indent.h"