diff --git a/elements/test/confparsetest.cc b/elements/test/confparsetest.cc
index 04d8476833..3566eada68 100644
--- a/elements/test/confparsetest.cc
+++ b/elements/test/confparsetest.cc
@@ -132,6 +132,7 @@ ConfParseTest::initialize(ErrorHandler *errh)
     CHECK(IntArg().parse("-0", i32) == true && i32 == 0);
     CHECK(IntArg().parse("-5", i32) == true && i32 == -5);
     CHECK(u32 == 97);
+    CHECK_ERR(IntArg().parse("aoeu", u32, args) == false && u32 == 97, "invalid number");
     CHECK(IntArg().parse("0", u32) == true && u32 == 0);
     CHECK(IntArg().parse("-0", u32) == false);
     CHECK(IntArg().parse("4294967294", u32) == true && u32 == 4294967294U);
@@ -174,6 +175,7 @@ ConfParseTest::initialize(ErrorHandler *errh)
     CHECK_ERR(BoundedIntArg(0U, 100U).parse("-1", i32, args) == false && i32 == 10, "out of range, bound 0");
     CHECK_ERR(BoundedIntArg(0U, 100U).parse("-1", i32, args) == false && i32 == 10, "out of range, bound 0");
     CHECK_ERR(BoundedIntArg(0U, ~0U).parse("-1", i32, args) == false && i32 == 10, "out of range, bound 0");
+    CHECK_ERR(BoundedIntArg(-1, 9).parse("aoeu", i32, args) == false && i32 == 10, "invalid number");
 
     bool b; (void) b;
     CHECK(FixedPointArg(1).parse("0.5", i32) == true && i32 == 1);
diff --git a/include/click/args.hh b/include/click/args.hh
index 9e33ee8a70..197e464ffb 100644
--- a/include/click/args.hh
+++ b/include/click/args.hh
@@ -1051,15 +1051,16 @@ class IntArg : public NumArg { public:
 
     template<typename V>
     bool parse_saturating(const String &str, V &result, const ArgContext &args = blank_args) {
-	(void) args;
 	constexpr bool is_signed = integer_traits<V>::is_signed;
 	constexpr int nlimb = int((sizeof(V) + sizeof(limb_type) - 1) / sizeof(limb_type));
 	limb_type x[nlimb];
 	if (parse(str.begin(), str.end(), is_signed, int(sizeof(V)), x, nlimb)
 	    != str.end())
 	    status = status_inval;
-	if (status && status != status_range)
+	if (status && status != status_range) {
+	    args.error("invalid number");
 	    return false;
+	}
 	typedef typename make_unsigned<V>::type unsigned_v_type;
 	extract_integer(x, reinterpret_cast<unsigned_v_type &>(result));
 	return true;