diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 0be433b6d7..f112cdbaf9 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -5538,7 +5538,7 @@ for VER in MAYAVERSIONS:
 for VER in MAXVERSIONS:
   VNUM=VER[3:]
   if (PkgSkip(VER)==0) and (PkgSkip("PANDATOOL")==0):
-    OPTS=['DIR:pandatool/src/maxegg', VER,  "WINCOMCTL", "WINCOMDLG", "WINUSER", "MSFORSCOPE"]
+    OPTS=['DIR:pandatool/src/maxegg', VER,  "WINCOMCTL", "WINCOMDLG", "WINUSER", "MSFORSCOPE", "RTTI"]
     TargetAdd('maxEgg'+VNUM+'.res', opts=OPTS, input='maxEgg.rc')
     TargetAdd('maxegg'+VNUM+'_loader.obj', opts=OPTS, input='maxEggLoader.cxx')
     TargetAdd('maxegg'+VNUM+'_composite1.obj', opts=OPTS, input='p3maxegg_composite1.cxx')
@@ -5555,7 +5555,7 @@ for VER in MAXVERSIONS:
 for VER in MAXVERSIONS:
   VNUM=VER[3:]
   if (PkgSkip(VER)==0) and (PkgSkip("PANDATOOL")==0):
-    OPTS=['DIR:pandatool/src/maxprogs', VER,  "WINCOMCTL", "WINCOMDLG", "WINUSER", "MSFORSCOPE"]
+    OPTS=['DIR:pandatool/src/maxprogs', VER,  "WINCOMCTL", "WINCOMDLG", "WINUSER", "MSFORSCOPE", "RTTI"]
     TargetAdd('maxImportRes.res', opts=OPTS, input='maxImportRes.rc')
     TargetAdd('maxprogs'+VNUM+'_maxeggimport.obj', opts=OPTS, input='maxEggImport.cxx')
     TargetAdd('maxeggimport'+VNUM+'.dle', input='maxegg'+VNUM+'_loader.obj')