diff --git a/direct/src/directscripts/packpanda.nsi b/direct/src/directscripts/packpanda.nsi
index d24a56fb7b..3e251a9c4a 100755
--- a/direct/src/directscripts/packpanda.nsi
+++ b/direct/src/directscripts/packpanda.nsi
@@ -139,7 +139,7 @@ Section "${SMDIRECTORY}" SecCore
             File /nonfatal /r "${PANDA}\plugins\*.dlo"
             File /nonfatal /r "${PANDA}\plugins\*.mll"
             File /nonfatal /r "${PANDA}\plugins\*.mel"
-            File ${PSOURCE}\doc\INSTALLING-PLUGINS.TXT
+            File "${PSOURCE}\doc\INSTALLING-PLUGINS.TXT"
             SetOutPath $INSTDIR\pandac\input
             File /r "${PANDA}\pandac\input\*"
             SetOutPath $INSTDIR\bin