diff --git a/scanner.go b/scanner.go
index aff29a6..e535cc6 100644
--- a/scanner.go
+++ b/scanner.go
@@ -192,4 +192,4 @@ func isLetter(ch rune) bool { return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && c
 // isDigit returns true if the rune is a digit.
 func isDigit(ch rune) bool { return (ch >= '0' && ch <= '9') }
 
-func isMisc(ch rune) bool { return (ch == '.' || ch == '/' || ch == '-') }
+func isMisc(ch rune) bool { return (ch == '.' || ch == '/' || ch == '-' || ch == ':') }
diff --git a/scanner_test.go b/scanner_test.go
index c5d1dfb..3fa3c05 100644
--- a/scanner_test.go
+++ b/scanner_test.go
@@ -27,6 +27,7 @@ func TestScanner_Scan(t *testing.T) {
 		{s: `"hello \"my\" friend bla\`, tok: COMMENT, lit: "hello \\\"my\\\" friend bla\\"},
 		{s: "hello friend", tok: IDENT, lit: "hello"},
 		{s: "192.168.178.2/24", tok: IDENT, lit: "192.168.178.2/24"},
+		{s: "2001:db8::/64", tok: IDENT, lit: "2001:db8::/64"},
 		{s: "# 192.168.178.2/24", tok: COMMENTLINE, lit: " 192.168.178.2/24"},
 	} {
 		s := newScanner(strings.NewReader(tc.s))