diff -r 46971430650b -r 838b427267bb libidav/davqlparser.c
--- a/libidav/davqlparser.c	Sat Apr 04 22:06:42 2015 +0200
+++ b/libidav/davqlparser.c	Sat Apr 04 22:20:39 2015 +0200
@@ -251,6 +251,7 @@
 #define _unknown_attribute "unknown attribute '%.*s'"
 #define _duplicated_attribute "duplicated attribute '%.*s'"
 #define _invalid_depth "invalid depth"
+#define _identifier_expected "identifier expected, but found: %.*s"
 
 static UcxList* dav_parse_tokenize(sstr_t src) {
     UcxList *tokens = NULL;
@@ -422,7 +423,7 @@
     /*
      * 1: depth
      */
-    int key = 0;
+    static int key = 0;
     static int keymask = 0;
 
     switch (parsestate) {
@@ -565,7 +566,13 @@
         case 20: {
             DavQLExpression *expr = dav_parse_expression(stmt, token, 1);
             stmt->path = expr->srctext;
+            int exprtype = expr->type;
             dav_free_expression(expr);
+            if (exprtype != DAVQL_IDENTIFIER) {
+                stmt->errorcode = DAVQL_ERROR_IDENTIFIER_EXPECTED;
+                stmt->errormessage = ucx_sprintf(_identifier_expected,
+                    sfmtarg(tokendata)).ptr;
+            }
             step = 530;
             break;
         }