diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 05d639e7d1..aeaa09585d 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -4026,12 +4026,12 @@ if (not RUNTIME):
 #
 
 if (not RUNTIME):
-  OPTS=['DIR:panda/src/display', 'BUILDING:PANDA']
+  OPTS=['DIR:panda/src/display', 'BUILDING:PANDA', 'X11']
   TargetAdd('p3display_graphicsStateGuardian.obj', opts=OPTS, input='graphicsStateGuardian.cxx')
   TargetAdd('p3display_composite1.obj', opts=OPTS, input='p3display_composite1.cxx')
   TargetAdd('p3display_composite2.obj', opts=OPTS, input='p3display_composite2.cxx')
 
-  OPTS=['DIR:panda/src/display']
+  OPTS=['DIR:panda/src/display', 'X11']
   IGATEFILES=GetDirectoryContents('panda/src/display', ["*.h", "*_composite*.cxx"])
   IGATEFILES.remove("renderBuffer.h")
   TargetAdd('libp3display.in', opts=OPTS, input=IGATEFILES)
@@ -5243,7 +5243,7 @@ if (GetTarget() == 'android' and PkgSkip("EGL")==0 and PkgSkip("GLES")==0 and no
 #
 
 if (not RUNTIME and (GetTarget() in ('windows', 'darwin') or PkgSkip("X11")==0) and PkgSkip("TINYDISPLAY")==0):
-  OPTS=['DIR:panda/src/tinydisplay', 'BUILDING:TINYDISPLAY']
+  OPTS=['DIR:panda/src/tinydisplay', 'BUILDING:TINYDISPLAY', 'X11']
   TargetAdd('p3tinydisplay_composite1.obj', opts=OPTS, input='p3tinydisplay_composite1.cxx')
   TargetAdd('p3tinydisplay_composite2.obj', opts=OPTS, input='p3tinydisplay_composite2.cxx')
   TargetAdd('p3tinydisplay_ztriangle_1.obj', opts=OPTS, input='ztriangle_1.cxx')