diff --git a/include/Orange/Formats/KeyValues.h b/include/Orange/Formats/KeyValues.h
index 48aa5e7..8b77c9c 100644
--- a/include/Orange/Formats/KeyValues.h
+++ b/include/Orange/Formats/KeyValues.h
@@ -335,39 +335,39 @@ namespace orange::kv
         return Get<const kv::KeyValues&>()[string];
     }
 
-    KeyValuesVariant::operator StringView()
+    inline KeyValuesVariant::operator StringView()
     {
         return Get<StringView>();
     }
-    KeyValuesVariant::operator int64_t()
+    inline KeyValuesVariant::operator int64_t()
     {
         return Get<int64_t>();
     }
-    KeyValuesVariant::operator int32_t()
+    inline KeyValuesVariant::operator int32_t()
     {
         return Get<int32_t>();
     }
-    KeyValuesVariant::operator float()
+    inline KeyValuesVariant::operator float()
     {
         return Get<float>();
     }
-    KeyValuesVariant::operator double()
+    inline KeyValuesVariant::operator double()
     {
         return Get<double>();
     }
-    KeyValuesVariant::operator void*()
+    inline KeyValuesVariant::operator void*()
     {
         return Get<void*>();
     }
-    KeyValuesVariant::operator RGBAColor32()
+    inline KeyValuesVariant::operator RGBAColor32()
     {
         return Get<RGBAColor32>();
     }
-    KeyValuesVariant::operator uint32_t()
+    inline KeyValuesVariant::operator uint32_t()
     {
         return Get<uint32_t>();
     }
-    KeyValuesVariant::operator uint64_t()
+    inline KeyValuesVariant::operator uint64_t()
     {
         return Get<uint64_t>();
     }