diff --git a/pack.c b/pack.c
index be454f2745..e8c5f391ba 100644
--- a/pack.c
+++ b/pack.c
@@ -294,7 +294,7 @@ static unsigned long utf8_to_uv(const char*,long*);
  *      L         | Integer | 32-bit unsigned, native endian (uint32_t)
  *      Q         | Integer | 64-bit unsigned, native endian (uint64_t)
  *                |         |
- *      c         | Integer | 8-bit signed (char)
+ *      c         | Integer | 8-bit signed (signed char)
  *      s         | Integer | 16-bit signed, native endian (int16_t)
  *      l         | Integer | 32-bit signed, native endian (int32_t)
  *      q         | Integer | 64-bit signed, native endian (int64_t)