diff --git a/recipes-qt/qt5/qtwebkit.inc b/recipes-qt/qt5/qtwebkit.inc
index 0c68134..287fa0d 100644
--- a/recipes-qt/qt5/qtwebkit.inc
+++ b/recipes-qt/qt5/qtwebkit.inc
@@ -14,3 +14,9 @@ EXTRA_QMAKEVARS_PRE += "${QTWEBKIT_DEBUG}"
 INC_PR = "r0"
 
 SRC_URI += "file://fix-rpath.patch"
+
+# make sure rb files are used from sysroot, not from host
+# ruby-1.9.3-always-use-i386.patch is doing target_cpu=`echo $target_cpu | sed s/i.86/i386/`
+# we need to replace it too (a bit longer version without importing re)
+RUBY_SYS = "${@ '${BUILD_SYS}'.replace('i486', 'i386').replace('i586', 'i386').replace('i686', 'i386') }"
+export RUBYLIB="${STAGING_DATADIR_NATIVE}/rubygems:${STAGING_LIBDIR_NATIVE}/ruby:${STAGING_LIBDIR_NATIVE}/ruby/${RUBY_SYS}"