xgl: Fix syntax error
diff --git a/update_external_sources.sh b/update_external_sources.sh
index f285763..4434eb7 100755
--- a/update_external_sources.sh
+++ b/update_external_sources.sh
@@ -111,7 +111,7 @@
    create_BIL
 fi
 
-if [ ! -d "$BASEDIR/BIL" -o ! -f "$BASEDIR/BIL/Bil.h"]; then
+if [ ! -d "$BASEDIR/BIL" -o ! -f "$BASEDIR/BIL/Bil.h" ]; then
       echo "Missing BIL, is your Khronos account correct?"
       exit 1
 fi