diff --git a/runzip.c b/runzip.c
index 55a38b7..ae48ab9 100644
--- a/runzip.c
+++ b/runzip.c
@@ -336,8 +336,8 @@ static i64 runzip_chunk(rzip_control *control, int fd_in, int fd_out, int fd_his
  */
 i64 runzip_fd(rzip_control *control, int fd_in, int fd_out, int fd_hist, i64 expected_size)
 {
-	char md5_resblock[MD5_DIGEST_SIZE];
-	char md5_stored[MD5_DIGEST_SIZE];
+	uchar md5_resblock[MD5_DIGEST_SIZE];
+	uchar md5_stored[MD5_DIGEST_SIZE];
 	struct timeval start,end;
 	i64 total = 0;
 
diff --git a/rzip.c b/rzip.c
index 61440c9..0930f3a 100644
--- a/rzip.c
+++ b/rzip.c
@@ -757,7 +757,7 @@ void rzip_fd(rzip_control *control, int fd_in, int fd_out)
 	 * If file size < compression window, can't do
 	 */
 	struct timeval current, start, last;
-	char md5_resblock[MD5_DIGEST_SIZE];
+	uchar md5_resblock[MD5_DIGEST_SIZE];
 	i64 len = 0, last_chunk = 0;
 	int pass = 0, passes, j;
 	struct rzip_state *st;
diff --git a/util.h b/util.h
index a5a868e..74fe819 100644
--- a/util.h
+++ b/util.h
@@ -36,12 +36,12 @@ void lrz_crypt(const rzip_control *control, uchar *buf, i64 len, const uchar *sa
 #define LRZ_DECRYPT	(0)
 #define LRZ_ENCRYPT	(1)
 
-static void lrz_encrypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt)
+static inline void lrz_encrypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt)
 {
 	lrz_crypt(control, buf, len, salt, LRZ_ENCRYPT);
 }
 
-static void lrz_decrypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt)
+static inline void lrz_decrypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt)
 {
 	lrz_crypt(control, buf, len, salt, LRZ_DECRYPT);
 }