diff --git a/lib/gssapi/gssapi/gssapi.h b/lib/gssapi/gssapi/gssapi.h
index 730737a46..3f217d38c 100644
--- a/lib/gssapi/gssapi/gssapi.h
+++ b/lib/gssapi/gssapi/gssapi.h
@@ -862,18 +862,18 @@ OM_uint32 GSSAPI_LIB_FUNCTION GSSAPI_DEPRECATED gss_unseal
             int * /*qop_state*/
            );
 
-/*
+/**
  *
  */
 
 OM_uint32 GSSAPI_LIB_FUNCTION
-gss_encapsulate_token(gss_buffer_t /* input_token */,
-		      gss_OID /* oid */,
+gss_encapsulate_token(const gss_buffer_t /* input_token */,
+		      const gss_OID /* oid */,
 		      gss_buffer_t /* output_token */);
 
 OM_uint32 GSSAPI_LIB_FUNCTION
-gss_decapsulate_token(gss_buffer_t /* input_token */,
-		      gss_OID /* oid */,
+gss_decapsulate_token(const gss_buffer_t /* input_token */,
+		      const gss_OID /* oid */,
 		      gss_buffer_t /* output_token */);
 
 
diff --git a/lib/gssapi/mech/gss_decapsulate_token.c b/lib/gssapi/mech/gss_decapsulate_token.c
index 8db0832d8..95a6c6844 100644
--- a/lib/gssapi/mech/gss_decapsulate_token.c
+++ b/lib/gssapi/mech/gss_decapsulate_token.c
@@ -34,8 +34,8 @@
 #include "mech_locl.h"
 
 OM_uint32 GSSAPI_LIB_FUNCTION
-gss_decapsulate_token(gss_buffer_t input_token,
-		      gss_OID oid,
+gss_decapsulate_token(const gss_buffer_t input_token,
+		      const gss_OID oid,
 		      gss_buffer_t output_token)
 {
     GSSAPIContextToken ct;
diff --git a/lib/gssapi/mech/gss_encapsulate_token.c b/lib/gssapi/mech/gss_encapsulate_token.c
index e14b00f9c..7a3e16536 100644
--- a/lib/gssapi/mech/gss_encapsulate_token.c
+++ b/lib/gssapi/mech/gss_encapsulate_token.c
@@ -34,8 +34,8 @@
 #include "mech_locl.h"
 
 OM_uint32 GSSAPI_LIB_FUNCTION
-gss_encapsulate_token(gss_buffer_t input_token,
-		      gss_OID oid,
+gss_encapsulate_token(const gss_buffer_t input_token,
+		      const gss_OID oid,
 		      gss_buffer_t output_token)
 {
     GSSAPIContextToken ct;