diff --git a/rpmrebuild/rpmrebuild.sh b/rpmrebuild/rpmrebuild.sh
index 155129c..3e6c540 100755
--- a/rpmrebuild/rpmrebuild.sh
+++ b/rpmrebuild/rpmrebuild.sh
@@ -363,7 +363,7 @@ function CheckTags
 
 function Main
 {
-	RPMREBUILD_TMPDIR=${RPMREBUILD_TMPDIR:-~/.tmp/rpmrebuild.$$}
+	RPMREBUILD_TMPDIR=${RPMREBUILD_TMPDIR:-${TMPDIR:-~/.tmp}/rpmrebuild.$$}
 	RPMREBUILD_BUGREPORT=$RPMREBUILD_TMPDIR/bugreport
 	export RPMREBUILD_BUGREPORT
 	export RPMREBUILD_TMPDIR