diff --git a/src/config.rs b/src/config.rs
index f712bde..eacb879 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -89,7 +89,12 @@ impl Config {
 		// This function defines the order of preference - first check for
 		// environment variables with "REDLIB", then check the config, then if
 		// both are `None`, return a `None` via the `map_or_else` function
-		let parse = |key: &str| -> Option<String> { var(key).ok().map_or_else(|| get_setting_from_config(key, &config), Some) };
+		let parse = |key: &str| -> Option<String> {
+			var(key).ok().map_or_else(
+				|| var(key.replace("REDLIB_", "LIBREDDIT_")).ok().map_or_else(|| get_setting_from_config(key, &config), Some),
+				Some,
+			)
+		};
 
 		Self {
 			sfw_only: parse("REDLIB_SFW_ONLY"),
@@ -169,6 +174,12 @@ fn test_config() {
 	assert_eq!(get_setting("REDLIB_DEFAULT_COMMENT_SORT"), Some("best".into()));
 }
 
+#[test]
+#[sealed_test(env = [("LIBREDDIT_SFW_ONLY", "on")])]
+fn test_env_var_legacy() {
+	assert!(crate::utils::sfw_only())
+}
+
 #[test]
 #[sealed_test(env = [("REDLIB_DEFAULT_COMMENT_SORT", "top")])]
 fn test_env_config_precedence() {