make error easier to understand

diff --git a/src/lib/util/value.c b/src/lib/util/value.c
index 9461ebd413d08ceff1f27776bb4346fa235a5c78..fa954ece4dac2a38151244ffb2f83f498800c7ca 100644 (file)
--- a/src/lib/util/value.c
+++ b/src/lib/util/value.c
@@ -5290,7 +5290,7 @@ parse:
                        FR_SBUFF_SET_RETURN(in, &our_in);
                }
 
-               fr_strerror_const("String value was not NULL");
+               fr_strerror_const("Unexpected value for data type NULL");
                return -1;
 
        /*