diff --git a/toolkit/mozapps/installer/windows/nsis/overrides.nsh b/toolkit/mozapps/installer/windows/nsis/overrides.nsh
index fcf564f74a9..1142882cf32 100755
--- a/toolkit/mozapps/installer/windows/nsis/overrides.nsh
+++ b/toolkit/mozapps/installer/windows/nsis/overrides.nsh
@@ -4,6 +4,9 @@
 !ifndef OVERRIDES_INCLUDED
 !define OVERRIDES_INCLUDED
 
+!include TextFunc.nsh
+!include FileFunc.nsh
+
 ; Modified version of Locate from the NSIS File Functions Header v3.2
 ; This version has the calls to SetDetailsPrint and DetailsPrint commented out.
 ; See <NSIS App Dir>/include/FileFunc.nsh for more information