diff --git a/src/libraries/turtle/function.hpp b/src/libraries/turtle/function.hpp
index d5a8973..622fe22 100644
--- a/src/libraries/turtle/function.hpp
+++ b/src/libraries/turtle/function.hpp
@@ -209,12 +209,12 @@ namespace mock
         << lazy_expectations( this )
 #define MOCK_EXPECTATION_INVOKE(z, n, A) \
     { \
+        valid_ = false; \
         for( expectations_cit it = expectations_.begin(); it != expectations_.end(); ++it ) \
             if( it->is_valid( BOOST_PP_ENUM_PARAMS(n, p) ) ) \
             { \
                 if( ! it->invoke() ) \
                 { \
-                    valid_ = false; \
                     error_type::sequence_failed( MOCK_EXPECTATION_CALL_CONTEXT(n), it->file(), it->line() ); \
                     return A; \
                 } \
@@ -223,10 +223,10 @@ namespace mock
                     error_type::missing_action( MOCK_EXPECTATION_CALL_CONTEXT(n), it->file(), it->line() ); \
                     return A; \
                 } \
+                valid_ = true; \
                 error_type::expected_call( MOCK_EXPECTATION_CALL_CONTEXT(n), it->file(), it->line() ); \
                 return it->functor()( BOOST_PP_ENUM_PARAMS(n, p) ); \
             } \
-        valid_ = false; \
         error_type::unexpected_call( MOCK_EXPECTATION_CALL_CONTEXT(n) ); \
         return A; \
     }
diff --git a/src/tests/turtle_test/function_test.cpp b/src/tests/turtle_test/function_test.cpp
index d9d3ca1..34a9e0c 100644
--- a/src/tests/turtle_test/function_test.cpp
+++ b/src/tests/turtle_test/function_test.cpp
@@ -215,6 +215,16 @@ BOOST_FIXTURE_TEST_CASE( verifying_a_once_expectation_before_the_call_fails, err
     }
 }
 
+BOOST_FIXTURE_TEST_CASE( verifying_a_once_expectation_after_a_verify_and_one_call_succeeds, error_fixture )
+{
+    mock::function< void() > f;
+    f.expect().once();
+    CHECK_ERROR( BOOST_CHECK( ! f.verify() ), verification_failed, 0, "?\n. once()" );
+    f();
+    BOOST_CHECK( f.verify() );
+    CHECK_CALLS( 1 );
+}
+
 // reset
 
 BOOST_FIXTURE_TEST_CASE( triggering_a_reset_function_calls_unexpected_call_error, error_fixture )