diff --git a/library/pkparse.c b/library/pkparse.c
index 6db9a5a..3fd45cd 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -949,7 +949,7 @@
     mbedtls_md_type_t md_alg;
 #endif
 
-    p = (unsigned char *) key;
+    p = key;
     end = p + keylen;
 
     if( pwdlen == 0 )