diff --git a/src/crypto.c b/src/crypto.c
index ac36616..4c2df24 100644
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -57,7 +57,7 @@ typedef struct {
   int iv_sz;
   int pass_sz;
   unsigned char *key;
-  unsigned char *pass;
+  char *pass;
 } cipher_ctx;
 
 typedef struct {