diff --git a/kdc/kstash.c b/kdc/kstash.c
index fd866d34e..3e6159cff 100644
--- a/kdc/kstash.c
+++ b/kdc/kstash.c
@@ -86,7 +86,7 @@ static int
 convert_file(void)
 {
     FILE *f;
-    char buf[1024];
+    unsigned char buf[1024];
     char *fn;
     size_t len;
     EncryptionKey key;
diff --git a/kuser/klist.c b/kuser/klist.c
index caa81f331..e2f74b7b5 100644
--- a/kuser/klist.c
+++ b/kuser/klist.c
@@ -300,7 +300,7 @@ display_tokens(int do_verbose)
 
     for (i = 0; k_pioctl(NULL, VIOCGETTOK, &parms, 0) == 0; i++) {
         int32_t size_secret_tok, size_public_tok;
-        char *cell;
+        unsigned char *cell;
 	struct ClearToken ct;
 	unsigned char *r = t;
 	struct timeval tv;
diff --git a/lib/gssapi/decapsulate.c b/lib/gssapi/decapsulate.c
index 57fabee8f..cdfa15bf5 100644
--- a/lib/gssapi/decapsulate.c
+++ b/lib/gssapi/decapsulate.c
@@ -43,7 +43,7 @@ RCSID("$Id$");
 OM_uint32
 gssapi_krb5_verify_header(u_char **str,
 			  size_t total_len,
-			  u_char *type)
+			  char *type)
 {
     size_t len, len_len, mech_len, foo;
     int e;
@@ -85,7 +85,7 @@ OM_uint32
 gssapi_krb5_decapsulate(
 			gss_buffer_t input_token_buffer,
 			krb5_data *out_data,
-			u_char *type
+			char *type
 )
 {
     u_char *p;
diff --git a/lib/gssapi/krb5/decapsulate.c b/lib/gssapi/krb5/decapsulate.c
index 57fabee8f..cdfa15bf5 100644
--- a/lib/gssapi/krb5/decapsulate.c
+++ b/lib/gssapi/krb5/decapsulate.c
@@ -43,7 +43,7 @@ RCSID("$Id$");
 OM_uint32
 gssapi_krb5_verify_header(u_char **str,
 			  size_t total_len,
-			  u_char *type)
+			  char *type)
 {
     size_t len, len_len, mech_len, foo;
     int e;
@@ -85,7 +85,7 @@ OM_uint32
 gssapi_krb5_decapsulate(
 			gss_buffer_t input_token_buffer,
 			krb5_data *out_data,
-			u_char *type
+			char *type
 )
 {
     u_char *p;
diff --git a/lib/roken/snprintf.c b/lib/roken/snprintf.c
index 3b6956024..1ea68a00a 100644
--- a/lib/roken/snprintf.c
+++ b/lib/roken/snprintf.c
@@ -125,7 +125,7 @@ as_append_char (struct state *state, unsigned char c)
 
 static int
 append_number(struct state *state,
-	      unsigned long num, unsigned base, unsigned char *rep,
+	      unsigned long num, unsigned base, char *rep,
 	      int width, int prec, int flags, int minusp)
 {
   int len = 0;