if test $ol_enable_spasswd != no ; then
                        ol_link_spasswd=yes
                fi
+
+               ac_save_LIBS="$LIBS"
+               LIBS="$LIBS $ol_link_sasl"
+               AC_CHECK_FUNC(sasl_version, [AC_DEFINE(HAVE_SASL_VERSION,1,
+                       [define if your SASL library has sasl_version()])])
+               LIBS="$ac_save_LIBS"
        fi
 
 else
 
                { SASL_CB_LIST_END, NULL, NULL }
        };
 
+#ifdef HAVE_SASL_VERSION
+#define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
+       (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
+
+       { int rc;
+       sasl_version( NULL, &rc );
+       if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
+               (rc & 0xffff) < SASL_VERSION_STEP) {
+
+#ifdef NEW_LOGGING
+               LDAP_LOG( TRANSPORT, INFO,
+               "ldap_int_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
+                       rc, SASL_BUILD_VERSION, 0 );
+#else
+               Debug( LDAP_DEBUG_ANY,
+               "ldap_int_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
+                       rc, SASL_BUILD_VERSION, 0 );
+#endif
+               return -1;
+       }
+       }
+#endif
        if ( sasl_initialized ) {
                return 0;
        }
 
                { SASL_CB_LIST_END, NULL, NULL }
        };
 
+#ifdef HAVE_SASL_VERSION
+#define SASL_BUILD_VERSION ((SASL_VERSION_MAJOR << 24) |\
+       (SASL_VERSION_MINOR << 16) | SASL_VERSION_STEP)
+
+       sasl_version( NULL, &rc );
+       if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
+               (rc & 0xffff) < SASL_VERSION_STEP) {
+
+#ifdef NEW_LOGGING
+               LDAP_LOG( TRANSPORT, INFO,
+               "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
+                       rc, SASL_BUILD_VERSION, 0 );
+#else
+               Debug( LDAP_DEBUG_ANY,
+               "slap_sasl_init: SASL version mismatch, got %x, wanted %x.\n",
+                       rc, SASL_BUILD_VERSION, 0 );
+#endif
+               return -1;
+       }
+#endif
+       
        sasl_set_alloc(
                ber_memalloc,
                ber_memcalloc,