diff --git a/include/CLI/App.hpp b/include/CLI/App.hpp
index 4d383565..0cbe4944 100644
--- a/include/CLI/App.hpp
+++ b/include/CLI/App.hpp
@@ -351,16 +351,16 @@ class App {
         return opt;
     }
 
-    /// Bool version only allows the flag once
+    /// Bool version
     template <typename T, enable_if_t<is_bool<T>::value, detail::enabler> = detail::dummy>
     Option *add_flag(std::string name,
                      T &count, ///< A varaible holding true if passed
                      std::string description = "") {
 
         count = false;
-        CLI::callback_t fun = [&count](CLI::results_t res) {
+        CLI::callback_t fun = [&count](CLI::results_t) {
             count = true;
-            return res.size() == 1;
+            return true;
         };
 
         Option *opt = add_option(name, fun, description, false);
diff --git a/tests/AppTest.cpp b/tests/AppTest.cpp
index 26b74f97..4d2ff049 100644
--- a/tests/AppTest.cpp
+++ b/tests/AppTest.cpp
@@ -154,7 +154,8 @@ TEST_F(TApp, BoolAndIntFlags) {
     app.reset();
 
     args = {"-b", "-b"};
-    EXPECT_THROW(run(), CLI::ConversionError);
+    EXPECT_NO_THROW(run());
+    EXPECT_TRUE(bflag);
 
     app.reset();
     bflag = false;
diff --git a/tests/IniTest.cpp b/tests/IniTest.cpp
index ccc48063..b21e9168 100644
--- a/tests/IniTest.cpp
+++ b/tests/IniTest.cpp
@@ -438,7 +438,8 @@ TEST_F(TApp, IniFlagNumbers) {
         out << "flag=3" << std::endl;
     }
 
-    EXPECT_THROW(run(), CLI::ConversionError);
+    EXPECT_NO_THROW(run());
+    EXPECT_TRUE(boo);
 }
 
 TEST_F(TApp, IniFlagDual) {