diff --git a/src/Data/Bits/Floating/Prim.hs b/src/Data/Bits/Floating/Prim.hs
index 474b145..4d7aae8 100644
--- a/src/Data/Bits/Floating/Prim.hs
+++ b/src/Data/Bits/Floating/Prim.hs
@@ -36,12 +36,12 @@ import GHC.Exts (Word64#, Word32#)
 #elif WORD_SIZE_IN_BITS == 64
 import GHC.Exts (Word#)
 #define WORD64 Word
-#if MIN_VERSION_base(4,15,0)
-#define WORD32 Word
-#else
+-- #if MIN_VERSION_base(4,15,0)
+-- #define WORD32 Word
+-- #else
 import GHC.Exts (Word32#)
 #define WORD32 Word32
-#endif
+-- #endif
 #else
 #error non-X86_64 architectures not supported
 #endif