diff --git a/src/SFML/System/Time.cpp b/src/SFML/System/Time.cpp
index b4e9ccbeb..94b743082 100644
--- a/src/SFML/System/Time.cpp
+++ b/src/SFML/System/Time.cpp
@@ -72,14 +72,14 @@ m_microseconds(microseconds)
 ////////////////////////////////////////////////////////////
 Time seconds(float amount)
 {
-    return Time(static_cast<Uint64>(amount * 1000000));
+    return Time(static_cast<Int64>(amount * 1000000));
 }
 
 
 ////////////////////////////////////////////////////////////
 Time milliseconds(Int32 amount)
 {
-    return Time(static_cast<Uint64>(amount) * 1000);
+    return Time(static_cast<Int64>(amount) * 1000);
 }