diff --git a/src/core/operations/FromBase85.mjs b/src/core/operations/FromBase85.mjs
index 3904479d..aaa1dc94 100644
--- a/src/core/operations/FromBase85.mjs
+++ b/src/core/operations/FromBase85.mjs
@@ -113,12 +113,8 @@ class FromBase85 extends Operation {
                     .split("")
                     .map((chr, idx) => {
                         const digit = alphabet.indexOf(chr);
-                        if (digit < 0 || digit > 84) {
-                            if (chr === "z") {
-                                // Pass (Ignore character)
-                            } else {
+                        if ((digit < 0 || digit > 84) && chr !== "z") {
                                 throw `Invalid character '${chr}' at index ${i + idx}`;
-                            }
                         }
                         return digit;
                     });