Fix typo in error string

1 files changed, 1 insertions, 1 deletions

diff --git a/src/DES.c b/src/DES.c
index 7df2e0c..41e4153 100644
--- a/src/DES.c
+++ b/src/DES.c
@@ -53,7 +53,7 @@ static void ltcseterr(int rc)
 #ifdef PCT_DES3_MODULE
         PyErr_SetString(PyExc_ValueError, "Invalid key size (must be either 16 or 24 bytes long)");
 #else
-        PyErr_SetString(PyExc_ValueError, "Invalid key size (must be either 8 bytes long)");
+        PyErr_SetString(PyExc_ValueError, "Invalid key size (must be 8 bytes long)");
 #endif
         break;