diff --git a/lib/gssapi/8003.c b/lib/gssapi/8003.c
index 283ac01a7..c4661226e 100644
--- a/lib/gssapi/8003.c
+++ b/lib/gssapi/8003.c
@@ -56,15 +56,17 @@ gssapi_encode_be_om_uint32(OM_uint32 n, u_char *p)
 }
 
 krb5_error_code
-gssapi_decode_om_uint32(u_char *p, OM_uint32 *n)
+gssapi_decode_om_uint32(const void *ptr, OM_uint32 *n)
 {
+    const u_char *p = ptr;
     *n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
     return 0;
 }
 
 krb5_error_code
-gssapi_decode_be_om_uint32(u_char *p, OM_uint32 *n)
+gssapi_decode_be_om_uint32(const void *ptr, OM_uint32 *n)
 {
+    const u_char *p = ptr;
     *n = (p[0] <<24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
     return 0;
 }
diff --git a/lib/gssapi/gssapi_locl.h b/lib/gssapi/gssapi_locl.h
index e0028146e..c33aea37d 100644
--- a/lib/gssapi/gssapi_locl.h
+++ b/lib/gssapi/gssapi_locl.h
@@ -291,9 +291,9 @@ krb5_error_code
 gssapi_encode_be_om_uint32(OM_uint32, u_char *);
 
 krb5_error_code
-gssapi_decode_om_uint32(u_char *, OM_uint32 *);
+gssapi_decode_om_uint32(const void *, OM_uint32 *);
 
 krb5_error_code
-gssapi_decode_be_om_uint32(u_char *, OM_uint32 *);
+gssapi_decode_be_om_uint32(const void *, OM_uint32 *);
 
 #endif
diff --git a/lib/gssapi/krb5/8003.c b/lib/gssapi/krb5/8003.c
index 283ac01a7..c4661226e 100644
--- a/lib/gssapi/krb5/8003.c
+++ b/lib/gssapi/krb5/8003.c
@@ -56,15 +56,17 @@ gssapi_encode_be_om_uint32(OM_uint32 n, u_char *p)
 }
 
 krb5_error_code
-gssapi_decode_om_uint32(u_char *p, OM_uint32 *n)
+gssapi_decode_om_uint32(const void *ptr, OM_uint32 *n)
 {
+    const u_char *p = ptr;
     *n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
     return 0;
 }
 
 krb5_error_code
-gssapi_decode_be_om_uint32(u_char *p, OM_uint32 *n)
+gssapi_decode_be_om_uint32(const void *ptr, OM_uint32 *n)
 {
+    const u_char *p = ptr;
     *n = (p[0] <<24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
     return 0;
 }
diff --git a/lib/gssapi/krb5/gssapi_locl.h b/lib/gssapi/krb5/gssapi_locl.h
index e0028146e..c33aea37d 100644
--- a/lib/gssapi/krb5/gssapi_locl.h
+++ b/lib/gssapi/krb5/gssapi_locl.h
@@ -291,9 +291,9 @@ krb5_error_code
 gssapi_encode_be_om_uint32(OM_uint32, u_char *);
 
 krb5_error_code
-gssapi_decode_om_uint32(u_char *, OM_uint32 *);
+gssapi_decode_om_uint32(const void *, OM_uint32 *);
 
 krb5_error_code
-gssapi_decode_be_om_uint32(u_char *, OM_uint32 *);
+gssapi_decode_be_om_uint32(const void *, OM_uint32 *);
 
 #endif