--- a/src/charls_jpegls_decoder.cpp
+++ b/src/charls_jpegls_decoder.cpp
@@ -103,11 +103,11 @@ struct charls_jpegls_decoder final
 
         switch (interleave_mode())
         {
-        case interleave_mode::none:
+        case charls::interleave_mode::none:
             return static_cast<size_t>(stride) * info.height * info.component_count;
 
-        case interleave_mode::line:
-        case interleave_mode::sample:
+        case charls::interleave_mode::line:
+        case charls::interleave_mode::sample:
             return static_cast<size_t>(stride) * info.height;
         }