diff --git a/helper/funcs.go b/helper/funcs.go
index e66ff40d1..49b300c24 100644
--- a/helper/funcs.go
+++ b/helper/funcs.go
@@ -263,6 +263,7 @@ func CleanEnvVar(s string, r byte) string {
 	for i, c := range b {
 		switch {
 		case c == '_':
+		case c == '.':
 		case c >= 'a' && c <= 'z':
 		case c >= 'A' && c <= 'Z':
 		case i > 0 && c >= '0' && c <= '9':
diff --git a/helper/funcs_test.go b/helper/funcs_test.go
index 564765c62..774030be1 100644
--- a/helper/funcs_test.go
+++ b/helper/funcs_test.go
@@ -66,7 +66,8 @@ func TestClearEnvVar(t *testing.T) {
 		{"asd0", "asd0"},
 		{"_asd", "_asd"},
 		{"-asd", "_asd"},
-		{"A~!@#$%^&*()_+-={}[]|\\;:'\"<,>.?/Z", "A_______________________________Z"},
+		{"asd.fgh", "asd.fgh"},
+		{"A~!@#$%^&*()_+-={}[]|\\;:'\"<,>?/Z", "A______________________________Z"},
 		{"A\U0001f4a9Z", "A____Z"},
 	}
 	for _, c := range cases {