1 files changed, 3 insertions, 0 deletions
diff --git a/configure b/configure
index e27ac5a..7ab3e22 100755
--- a/configure
+++ b/configure
@@ -6216,6 +6216,9 @@ QT_BUILD_KEY_COMPAT=
 if [ "$QT_CROSS_COMPILE" = "no" ]; then
     # previous versions of Qt used a build key built from the uname
     QT_BUILD_KEY_COMPAT="$CFG_USER_BUILD_KEY $UNAME_MACHINE $UNAME_SYSTEM $COMPILER $BUILD_OPTIONS"
+    if [ -n "$QT_NAMESPACE" ]; then
+        QT_BUILD_KEY_COMPAT="$QT_BUILD_KEY_COMPAT $QT_NAMESPACE"
+    fi
 fi
 # strip out leading/trailing/extra whitespace
 QT_BUILD_KEY=`echo $QT_BUILD_KEY | sed -e "s,  *, ,g" -e "s,^  *,," -e "s,  *$,,"`