--- a/im/config/mozconfigs/win32/mozconfig
+++ b/im/config/mozconfigs/win32/mozconfig
@@ -9,14 +9,16 @@ export MOZILLA_OFFICIAL=1
 # For NSS symbols
 export MOZ_DEBUG_SYMBOLS=1
 
 ac_add_options --enable-application=im
 ac_add_options --enable-extensions=purple
 ac_add_options --enable-update-channel=nightly
 ac_add_options --enable-optimize
 ac_add_options --disable-debug
+# The Windows 8 SDK is required for gamepad support.
+ac_add_options --disable-gamepad
 ac_add_options --enable-update-packaging
 ac_add_options --enable-jemalloc
 
 if [ `date +%m%d` = 1031 -o `date +%m%d` = 1101 ]; then
 ac_add_options --with-branding=instantbird/branding/halloween
 fi

--- a/im/config/mozconfigs/win32/mozconfig-release
+++ b/im/config/mozconfigs/win32/mozconfig-release
@@ -9,12 +9,14 @@ export MOZILLA_OFFICIAL=1
 # For NSS symbols
 export MOZ_DEBUG_SYMBOLS=1
 
 ac_add_options --enable-application=im
 ac_add_options --enable-extensions=purple
 ac_add_options --enable-update-channel=release
 ac_add_options --enable-optimize
 ac_add_options --disable-debug
+# The Windows 8 SDK is required for gamepad support.
+ac_add_options --disable-gamepad
 ac_add_options --enable-update-packaging
 ac_add_options --enable-jemalloc
 ac_add_options --enable-official-branding
 ac_add_options --with-l10n-base=..