diff --git a/c/dtypes.h b/c/dtypes.h
index c8f0e11..53b6845 100644
--- a/c/dtypes.h
+++ b/c/dtypes.h
@@ -104,20 +104,13 @@ typedef int bool_t;
 #ifdef BITS64
 #define TOP_BIT 0x8000000000000000
 #define NBITS 64
-typedef int64_t offset_t;
 typedef uint64_t index_t;
 #else
 #define TOP_BIT 0x80000000
 #define NBITS 32
-typedef int32_t offset_t;
 typedef uint32_t index_t;
 #endif
 
-typedef uint8_t uint8_t;
-typedef uint16_t uint16_t;
-typedef uint32_t uint32_t;
-typedef uint64_t uint64_t;
-
 #define LLT_ALIGN(x, sz) (((x) + (sz - 1)) & (-sz))
 
 // branch prediction annotations
diff --git a/c/flisp.h b/c/flisp.h
index 19b2818..ca598ed 100644
--- a/c/flisp.h
+++ b/c/flisp.h
@@ -1,6 +1,6 @@
 typedef uintptr_t value_t;
-typedef intptr_t fixnum_t;
 typedef uintptr_t ufixnum_t;
+typedef intptr_t fixnum_t;
 #ifdef BITS64
 #define T_FIXNUM T_INT64
 #else