diff --git a/conf/confbase.Y b/conf/confbase.Y
index 195efff1..40ea16de 100644
--- a/conf/confbase.Y
+++ b/conf/confbase.Y
@@ -123,7 +123,7 @@ CF_DECLS
 %type <bs> bytestring
 %type <s> symbol symbol_known toksym 
 
-%type <v> bytestring_text
+%type <v> bytestring_text text_or_ipa
 %type <x> bytestring_expr
 
 %nonassoc PREFIX_DUMMY
@@ -412,6 +412,24 @@ opttext:
  | /* empty */ { $$ = NULL; }
  ;
 
+text_or_ipa:
+   TEXT { $$.type = T_STRING; $$.val.s = $1; }
+ | IP4 { $$.type = T_IP; $$.val.ip = ipa_from_ip4($1); }
+ | IP6 { $$.type = T_IP; $$.val.ip = ipa_from_ip6($1); }
+ | CF_SYM_KNOWN {
+     if (($1->class == (SYM_CONSTANT | T_STRING)) ||
+	 ($1->class == (SYM_CONSTANT | T_IP)))
+       $$ = *($1->val);
+     else
+       cf_error("String or IP constant expected");
+   }
+ | '(' term ')' {
+     $$ = *cf_eval($2, T_VOID);
+     if (($$.type != T_BYTESTRING) && ($$.type != T_STRING))
+       cf_error("Bytestring or string value expected");
+   }
+ ;
+
 bytestring:
    BYTETEXT
  | bytestring_expr { $$ = cf_eval($1, T_BYTESTRING)->val.bs; }
diff --git a/filter/config.Y b/filter/config.Y
index 238a1c46..53884bb7 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -337,7 +337,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
 %nonassoc ELSE
 
 %type <xp> cmds_int cmd_prep
-%type <x> term term_bs cmd cmd_var cmds cmds_scoped constant constructor print_list var var_init var_list function_call symbol_value bgp_path_expr bgp_path bgp_path_tail
+%type <x> term term_bs cmd cmd_var cmds cmds_scoped constant constructor print_list var var_list function_call symbol_value bgp_path_expr bgp_path bgp_path_tail
 %type <fsa> static_attr
 %type <f> filter where_filter
 %type <fl> filter_body function_body
@@ -913,16 +913,16 @@ print_list: /* EMPTY */ { $$ = NULL; }
    }
  ;
 
-var_init:
-   /* empty */ { $$ = f_new_inst(FI_CONSTANT, (struct f_val) { }); }
- | '=' term { $$ = $2; }
- ;
-
 var:
-   type symbol var_init ';' {
+   type symbol '=' term ';' {
      struct symbol *sym = cf_define_symbol($2, SYM_VARIABLE | $1, offset, f_new_var(sym_->scope));
-     $$ = f_new_inst(FI_VAR_INIT, $3, sym);
+     $$ = f_new_inst(FI_VAR_INIT, $4, sym);
    }
+ | type symbol ';' {
+     struct symbol *sym = cf_define_symbol($2, SYM_VARIABLE | $1, offset, f_new_var(sym_->scope));
+     $$ = f_new_inst(FI_VAR_INIT0, sym);
+   }
+ ;
 
 for_var:
    type symbol { $$ = cf_define_symbol($2, SYM_VARIABLE | $1, offset, f_new_var(sym_->scope)); }
diff --git a/filter/f-inst.c b/filter/f-inst.c
index f467ea47..bc5477a3 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -513,6 +513,7 @@
     RESULT(T_BOOL, i, ipa_is_ip4(v1.val.ip));
   }
 
+  /* Add initialized variable */
   INST(FI_VAR_INIT, 1, 0) {
     NEVER_CONSTANT;
     ARG_ANY(1);
@@ -525,6 +526,17 @@
     fstk->vcnt = pos + 1;
   }
 
+  /* Add uninitialized variable */
+  INST(FI_VAR_INIT0, 0, 0) {
+    NEVER_CONSTANT;
+    SYMBOL;
+
+    /* New variable is always the last on stack */
+    uint pos = curline.vbase + sym->offset;
+    fstk->vstk[pos] = (struct f_val) { };
+    fstk->vcnt = pos + 1;
+  }
+
   /* Set to indirect value prepared in v1 */
   INST(FI_VAR_SET, 1, 0) {
     NEVER_CONSTANT;
diff --git a/filter/test.conf b/filter/test.conf
index 812191f1..20d67f43 100644
--- a/filter/test.conf
+++ b/filter/test.conf
@@ -740,8 +740,8 @@ bt_test_suite(t_prefix_set, "Testing prefix sets");
  */
 
 function t_prefix6()
-prefix px;
 {
+	prefix px;
 	px = 1020::/18;
 	bt_assert(format(px) = "1020::/18");
 	bt_assert(1020:3040:5060:: ~ 1020:3040:5000::/40);
@@ -1086,8 +1086,8 @@ bt_test_suite(t_clist, "Testing lists of communities");
  */
 
 function t_ec()
-ec cc;
 {
+	ec cc;
 	cc = (rt, 12345, 200000);
 	bt_assert(format(cc) = "(rt, 12345, 200000)");
 
diff --git a/proto/rpki/config.Y b/proto/rpki/config.Y
index 743b5b42..0cc34b35 100644
--- a/proto/rpki/config.Y
+++ b/proto/rpki/config.Y
@@ -90,20 +90,22 @@ rpki_keep_interval:
 
 rpki_proto_item_port: PORT expr { check_u16($2); RPKI_CFG->port = $2; };
 
-rpki_cache_addr:
-   text {
-     rpki_check_unused_hostname();
-     RPKI_CFG->hostname = $1;
-   }
- | ipa {
-     rpki_check_unused_hostname();
-     RPKI_CFG->ip = $1;
-     /* Ensure hostname is filled */
-     char *hostname = cfg_allocz(INET6_ADDRSTRLEN + 1);
-     bsnprintf(hostname, INET6_ADDRSTRLEN+1, "%I", RPKI_CFG->ip);
-     RPKI_CFG->hostname = hostname;
-   }
- ;
+rpki_cache_addr: text_or_ipa
+{
+  rpki_check_unused_hostname();
+  if ($1.type == T_STRING)
+    RPKI_CFG->hostname = $1.val.s;
+  else if ($1.type == T_IP)
+  {
+    RPKI_CFG->ip = $1.val.ip;
+
+    /* Ensure hostname is filled */
+    char *hostname = cfg_allocz(INET6_ADDRSTRLEN + 1);
+    bsnprintf(hostname, INET6_ADDRSTRLEN+1, "%I", RPKI_CFG->ip);
+    RPKI_CFG->hostname = hostname;
+  }
+  else bug("Bad text_or_ipa");
+};
 
 rpki_transport:
    TCP rpki_transport_tcp_init