diff --git a/tokenhandlers_builtin.go b/tokenhandlers_builtin.go
index f2525d1..becf6aa 100644
--- a/tokenhandlers_builtin.go
+++ b/tokenhandlers_builtin.go
@@ -584,6 +584,9 @@ func MatchSigned(handler TokenHandler) TokenHandler {
 // It uses an int64 for checking internally, so you can check values
 // ranging from -9223372036854775808 to 9223372036854775807.
 func MatchIntegerBetween(min int64, max int64) TokenHandler {
+	if max < min {
+		callerPanic(1, "TokenHandler: MatchIntegerBetween definition error at {caller}: max %d must not be < min %d", max, min)
+	}
 	digits := MatchSigned(MatchDigits())
 	return func(t *TokenAPI) bool {
 		fork := t.Fork()
diff --git a/tokenhandlers_builtin_test.go b/tokenhandlers_builtin_test.go
index 4b06b01..39ed4ba 100644
--- a/tokenhandlers_builtin_test.go
+++ b/tokenhandlers_builtin_test.go
@@ -82,6 +82,8 @@ func TestCombinatorPanics(t *testing.T) {
 			`TokenHandler: MatchMin definition error at /.*/tokenhandlers_builtin_test\.go:\d+: min must be >= 0`},
 		{func() { c.Max(-42, parsekit.A.Space) }, true,
 			`TokenHandler: MatchMax definition error at /.*/tokenhandlers_builtin_test\.go:\d+: max must be >= 0`},
+		{func() { a.IntegerBetween(10, -10) }, true,
+			`TokenHandler: MatchIntegerBetween definition error at /.*/tokenhandlers_builtin_test.go:\d+: max -10 must not be < min 10`},
 	})
 }