diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 214fbc4493..ac07b7717f 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -3883,6 +3883,7 @@ if (RTDIST or RUNTIME):
       OPTS=['NOSTRIP', 'OPENSSL', 'FLTK', 'WINCOMCTL', 'WINSOCK']
     else:
       OPTS.append("WX")
+      if (sys.platform=="darwin"): OPTS.append("GL")
       TargetAdd('plugin_p3dCert.obj', opts=OPTS, input='p3dCert_wx.cxx')
       TargetAdd('p3dcert.exe', input='plugin_mkdir_complete.obj')
       TargetAdd('p3dcert.exe', input='plugin_p3dCert.obj')