--- a/browser/config/mozconfigs/win64/mingw32
+++ b/browser/config/mozconfigs/win64/mingw32
@@ -32,19 +32,17 @@ ac_add_options --with-toolchain-prefix=x
 # GCC compiling for Windows exposes a lot of warnings. We are tracking them in Bug 1394433
 ac_add_options --disable-warnings-as-errors
 
 # Temporary config settings until we get these working on mingw
 ac_add_options --disable-accessibility # https://sourceforge.net/p/mingw-w64/bugs/648/
 
 # Long story
 ac_add_options --disable-stylo # Bug 1390583
-
-# Sandbox isn't support on MinGW 64 yet
-ac_add_options --disable-sandbox
+ac_add_options --disable-jemalloc # Bug 1466192
 
 # These aren't supported on mingw at this time
 ac_add_options --disable-webrtc # Bug 1393901
 ac_add_options --disable-maintenance-service
 
 # Find our toolchain
 CC="$TOOLTOOL_DIR/mingw32/bin/x86_64-w64-mingw32-gcc"
 CXX="$TOOLTOOL_DIR/mingw32/bin/x86_64-w64-mingw32-g++"