diff --git a/packages/minimongo/minimongo_tests.js b/packages/minimongo/minimongo_tests.js
index 3a2d2260eb..5b3e1a5dd0 100644
--- a/packages/minimongo/minimongo_tests.js
+++ b/packages/minimongo/minimongo_tests.js
@@ -2380,3 +2380,37 @@ Tinytest.add("minimongo - $near operator tests", function (test) {
   });
 });
 
+Tinytest.add("minimongo - modifier affects selector", function (test) {
+  function testSelectorPaths (sel, paths, desc) {
+    test.isTrue(_.isEqual(LocalCollection._getSelectorPaths(sel), paths), desc);
+  }
+
+  testSelectorPaths({
+    foo: {
+      bar: 3,
+      baz: 42
+    }
+  }, ['foo'], "literal");
+
+  testSelectorPaths({
+    foo: 42,
+    bar: 33
+  }, ['foo', 'bar'], "literal");
+
+  testSelectorPaths({
+    foo: [ 'something' ],
+    bar: "asdf"
+  }, ['foo', 'bar'], "literal");
+
+  testSelectorPaths({
+    a: { $lt: 3 },
+    b: "you know, literal",
+    'path.is.complicated': { $not: { $regex: 'acme.*corp' } }
+  }, ['a', 'b', 'path.is.complicated'], "literal + operators");
+
+  testSelectorPaths({
+    $or: [{ 'a.b': 1 }, { 'a.b.c': { $lt: 22 } },
+     {$and: [{ 'x.d': { $ne: 5, $gte: 433 } }, { 'a.b': 234 }]}]
+  }, ['a.b', 'a.b.c', 'x.d'], 'group operators + duplicates');
+});
+
diff --git a/packages/minimongo/selector.js b/packages/minimongo/selector.js
index 4bdead6640..74729b7152 100644
--- a/packages/minimongo/selector.js
+++ b/packages/minimongo/selector.js
@@ -811,15 +811,17 @@ LocalCollection._isSelectorAffectedByModifier = function (selector, modifier) {
     return _.filter(path.split('.'), isNaN).join('.');
   }
 
-  function getPaths (sel, parentKeys) {
-    parentKeys = parentKeys || [];
-    return _.chain(sel).map(function (v, k) {
-      // we don't know how to handle $where because it can be anything
-      if (k === "$where")
-        return ''; // matches everything
-      if (_.has(LOGICAL_OPERATORS, k))
-        return getPaths(v, parentKeys.concat(k));
-      return parentKeys.concat(k).join('.');
-    }).flatten().uniq().value();
-  }
+};
+
+// Returns a list of key paths the given selector is looking for
+var getPaths = LocalCollection._getSelectorPaths = function (sel, parentKeys) {
+  parentKeys = parentKeys || [];
+  return _.chain(sel).map(function (v, k) {
+    // we don't know how to handle $where because it can be anything
+    if (k === "$where")
+      return ''; // matches everything
+    if (_.has(LOGICAL_OPERATORS, k))
+      return _.map(v, function (x) { return getPaths(x, parentKeys); });
+    return parentKeys.concat(k).join('.');
+  }).flatten().uniq().value();
 };