diff --git a/src/mem/cache/compressors/dictionary_compressor.hh b/src/mem/cache/compressors/dictionary_compressor.hh
index fce79d5e81..650edab5a0 100644
--- a/src/mem/cache/compressors/dictionary_compressor.hh
+++ b/src/mem/cache/compressors/dictionary_compressor.hh
@@ -464,7 +464,7 @@ class DictionaryCompressor<T>::MaskedPattern
         const DictionaryEntry bytes,
         const bool allocate = true)
       : DictionaryCompressor<T>::Pattern(number, code, metadata_length,
-            popCount(~mask), match_location, allocate),
+            popCount(static_cast<T>(~mask)), match_location, allocate),
         bits(DictionaryCompressor<T>::fromDictionaryEntry(bytes) & ~mask)
     {
     }