diff --git a/panda/src/testbed/pgrid.cxx b/panda/src/testbed/pgrid.cxx
index 4d3e8f35ac..dd88addf4c 100644
--- a/panda/src/testbed/pgrid.cxx
+++ b/panda/src/testbed/pgrid.cxx
@@ -23,7 +23,11 @@
 #include "string_utils.h"
 #include "pvector.h"
 
+#ifdef HAVE_GETOPT
 #include <getopt.h>
+#else
+#include "gnu_getopt.h"
+#endif
 
 
 #define RANDFRAC (rand()/(float)(RAND_MAX))