diff --git a/portal/server/src/main/java/org/diskproject/server/repository/DiskRepository.java b/portal/server/src/main/java/org/diskproject/server/repository/DiskRepository.java
index 4ea57de..9449f65 100644
--- a/portal/server/src/main/java/org/diskproject/server/repository/DiskRepository.java
+++ b/portal/server/src/main/java/org/diskproject/server/repository/DiskRepository.java
@@ -641,7 +641,7 @@ public Map<String, List<String>> queryExternalStore(String username, String doma
         if (variables == null || variables.contentEquals("")) {
             queryVars = "*";
         } else {
-            String[] vars = variables.replaceAll("\s+", " ").split(" ");
+            String[] vars = variables.replaceAll("\\s+", " ").split(" ");
             for (String v: vars) {
                 if (v.charAt(0) != '?')
                     return dataVarBindings;