diff --git a/build-extensions b/build-extensions
index 6d8a736..2c334d1 100755
--- a/build-extensions
+++ b/build-extensions
@@ -118,7 +118,7 @@ idnsrcdir=${idn//.tar.gz}
 xcbsrcdir=${xcb//.tar.gz}
 xcbutilsrcdir=${xcbutil//.tar.gz}
 xcbprotosrcdir=${xcbproto//.tar.gz}
-expatsrcdi=${expat//.tar.xz}
+expatsrcdir=${expat//.tar.xz}
 utillinuxsrcdir=${utillinux//.tar.xz}
 
 if [ ! -d "$tmpdir" ]; then