diff --git a/filter/filter.c b/filter/filter.c
index 8426a214..b8044293 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -523,16 +523,21 @@ interpret(struct f_inst *what)
     break;
     
   case '&':
-    TWOARGS_C;
-    res.type = v1.type;
-    if (res.type != T_BOOL) runtime( "Can't do boolean operation on non-booleans" );
-    res.val.i = v1.val.i && v2.val.i;
-    break;
   case '|':
-    TWOARGS_C;
-    res.type = v1.type;
-    if (res.type != T_BOOL) runtime( "Can't do boolean operation on non-booleans" );
-    res.val.i = v1.val.i || v2.val.i;
+    ARG(v1, a1.p);
+    if (v1.type != T_BOOL)
+      runtime( "Can't do boolean operation on non-booleans" );
+    if (v1.val.i == (what->code == '|')) {
+      res.type = T_BOOL;
+      res.val.i = v1.val.i;
+      break;
+    }
+
+    ARG(v2, a2.p);
+    if (v2.type != T_BOOL)
+      runtime( "Can't do boolean operation on non-booleans" );
+    res.type = T_BOOL;
+    res.val.i = v2.val.i;
     break;
 
   case P('m','p'):
@@ -577,6 +582,7 @@ interpret(struct f_inst *what)
     res.val.i = val_in_range(v1, v2);
     if (res.val.i == CMP_ERROR)
       runtime( "~ applied on unknown type pair" );
+    res.val.i = !!res.val.i;
     break;
   case P('d','e'):
     ONEARG;
diff --git a/filter/test.conf b/filter/test.conf
index 6d7a7082..fd025ca5 100644
--- a/filter/test.conf
+++ b/filter/test.conf
@@ -180,7 +180,7 @@ string s;
 	is = [ 2, 3, 4, 7..11 ];
 	print "  must be true: ", 1.2.0.0/16 ~ [ 1.0.0.0/8{ 15 , 17 } ];
 	print "  data types; must be true: ", 1.2.3.4 = 1.2.3.4, ",", 1 ~ [1,2,3], ",", 5 ~ [1..20], ",", 10 ~ is, ",", 2 ~ [ 1, 2, 3 ], ",", 5 ~ [ 4 .. 7 ], ",", 1.2.3.4 ~ [ 1.2.3.3..1.2.3.5 ], ",", 1.2.3.4 ~ 1.0.0.0/8, ",", 1.0.0.0/8 ~ 1.0.0.0/8, ",", 1.0.0.0/8 ~ [ 1.0.0.0/8+ ];
-	print "  must be true: ", true && true, ",", true || false, ",", ! false && ! false && true, ",", 1 < 2 && 1 != 3, ",", true && true && ! false;
+	print "  must be true: ", true && true, ",", true || false, ",", ! false && ! false && true, ",", 1 < 2 && 1 != 3, ",", true && true && ! false, ",", true || 1+"a", ",", !(false && 1+"a");
 
 	print "  must be true: ", defined(1), ",", defined(1.2.3.4), ",", 1 != 2, ",", 1 <= 2;
 	print "  data types: must be false: ", 1 ~ [ 2, 3, 4 ], ",", 5 ~ is, ",", 1.2.3.4 ~ [ 1.2.3.3, 1.2.3.5 ], ",", (1,2) > (2,2), ",", (1,1) > (1,1), ",", 1.0.0.0/9 ~ [ 1.0.0.0/8- ], ",", 1.2.0.0/17 ~ [ 1.0.0.0/8{ 15 , 16 } ], ",", true && false;